diff --git a/nbproject/project.properties b/nbproject/project.properties
index f704bcf..4905bab 100644
--- a/nbproject/project.properties
+++ b/nbproject/project.properties
@@ -1,73 +1,73 @@
-annotation.processing.enabled=true
-annotation.processing.enabled.in.editor=false
-annotation.processing.processors.list=
-annotation.processing.run.all.processors=true
-annotation.processing.source.output=${build.generated.sources.dir}/ap-source-output
-application.title=TSE
-application.vendor=aNNiMON
-build.classes.dir=${build.dir}/classes
-build.classes.excludes=**/*.java,**/*.form
-# This directory is removed when the project is cleaned:
-build.dir=build
-build.generated.dir=${build.dir}/generated
-build.generated.sources.dir=${build.dir}/generated-sources
-# Only compile against the classpath explicitly listed here:
-build.sysclasspath=ignore
-build.test.classes.dir=${build.dir}/test/classes
-build.test.results.dir=${build.dir}/test/results
-# Uncomment to specify the preferred debugger connection transport:
-#debug.transport=dt_socket
-debug.classpath=\
-    ${run.classpath}
-debug.test.classpath=\
-    ${run.test.classpath}
-# This directory is removed when the project is cleaned:
-dist.dir=dist
-dist.jar=${dist.dir}/TSE.jar
-dist.javadoc.dir=${dist.dir}/javadoc
-endorsed.classpath=
-excludes=
-includes=**
-jar.compress=false
-javac.classpath=
-# Space-separated list of extra javac options
-javac.compilerargs=
-javac.deprecation=false
-javac.processorpath=\
-    ${javac.classpath}
-javac.source=1.7
-javac.target=1.7
-javac.test.classpath=\
-    ${javac.classpath}:\
-    ${build.classes.dir}
-javac.test.processorpath=\
-    ${javac.test.classpath}
-javadoc.additionalparam=
-javadoc.author=false
-javadoc.encoding=${source.encoding}
-javadoc.noindex=false
-javadoc.nonavbar=false
-javadoc.notree=false
-javadoc.private=false
-javadoc.splitindex=true
-javadoc.use=true
-javadoc.version=false
-javadoc.windowtitle=
-main.class=tse.Main
-manifest.file=manifest.mf
-meta.inf.dir=${src.dir}/META-INF
-mkdist.disabled=false
-platform.active=default_platform
-run.classpath=\
-    ${javac.classpath}:\
-    ${build.classes.dir}
-# Space-separated list of JVM arguments used when running the project.
-# You may also define separate properties like run-sys-prop.name=value instead of -Dname=value.
-# To set system properties for unit tests define test-sys-prop.name=value:
-run.jvmargs=
-run.test.classpath=\
-    ${javac.test.classpath}:\
-    ${build.test.classes.dir}
-source.encoding=UTF-8
-src.dir=src
-test.src.dir=test
+annotation.processing.enabled=true
+annotation.processing.enabled.in.editor=false
+annotation.processing.processors.list=
+annotation.processing.run.all.processors=true
+annotation.processing.source.output=${build.generated.sources.dir}/ap-source-output
+application.title=TSE
+application.vendor=aNNiMON
+build.classes.dir=${build.dir}/classes
+build.classes.excludes=**/*.java,**/*.form
+# This directory is removed when the project is cleaned:
+build.dir=build
+build.generated.dir=${build.dir}/generated
+build.generated.sources.dir=${build.dir}/generated-sources
+# Only compile against the classpath explicitly listed here:
+build.sysclasspath=ignore
+build.test.classes.dir=${build.dir}/test/classes
+build.test.results.dir=${build.dir}/test/results
+# Uncomment to specify the preferred debugger connection transport:
+#debug.transport=dt_socket
+debug.classpath=\
+    ${run.classpath}
+debug.test.classpath=\
+    ${run.test.classpath}
+# This directory is removed when the project is cleaned:
+dist.dir=dist
+dist.jar=${dist.dir}/TSE.jar
+dist.javadoc.dir=${dist.dir}/javadoc
+endorsed.classpath=
+excludes=
+includes=**
+jar.compress=false
+javac.classpath=
+# Space-separated list of extra javac options
+javac.compilerargs=
+javac.deprecation=false
+javac.processorpath=\
+    ${javac.classpath}
+javac.source=1.7
+javac.target=1.7
+javac.test.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}
+javac.test.processorpath=\
+    ${javac.test.classpath}
+javadoc.additionalparam=
+javadoc.author=false
+javadoc.encoding=${source.encoding}
+javadoc.noindex=false
+javadoc.nonavbar=false
+javadoc.notree=false
+javadoc.private=false
+javadoc.splitindex=true
+javadoc.use=true
+javadoc.version=false
+javadoc.windowtitle=
+main.class=module1.variant4.Task_2
+manifest.file=manifest.mf
+meta.inf.dir=${src.dir}/META-INF
+mkdist.disabled=false
+platform.active=default_platform
+run.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}
+# Space-separated list of JVM arguments used when running the project.
+# You may also define separate properties like run-sys-prop.name=value instead of -Dname=value.
+# To set system properties for unit tests define test-sys-prop.name=value:
+run.jvmargs=
+run.test.classpath=\
+    ${javac.test.classpath}:\
+    ${build.test.classes.dir}
+source.encoding=UTF-8
+src.dir=src
+test.src.dir=test
diff --git a/src/module1/variant4/Matrix.java b/src/module1/variant4/Matrix.java
new file mode 100644
index 0000000..251034e
--- /dev/null
+++ b/src/module1/variant4/Matrix.java
@@ -0,0 +1,98 @@
+package module1.variant4;
+
+/**
+ *
+ * @author aNNiMON
+ */
+public class Matrix {
+    
+    protected int[][] matrix;
+    
+    public Matrix(int row, int columns) {
+        if ( (row < 1) || (columns < 1) ) {
+            throw new RuntimeException("Размер матрицы должен быть больше 0");
+        }
+        matrix = new int[row][columns];
+    }
+    
+    public Matrix(int[][] matrix) {
+        this.matrix = matrix;
+    }
+    
+    public int getRowSize() {
+        return matrix.length;
+    }
+    
+    public int getColumnSize() {
+        return matrix[0].length;
+    }
+    
+    public int[][] getMatrix() {
+        return matrix;
+    }
+    
+    public void setMatrix(int[][] matrix) {
+        this.matrix = matrix;
+    }
+    
+    public void setRow(int row, int[] vector) {
+        this.matrix[row] = vector;
+    }
+    
+    public void setCell(int row, int column, int value) {
+        this.matrix[row][column] = value;
+    }
+    
+    public Matrix multiply(Matrix other) {
+        int[][] matrixA = matrix;
+        int[][] matrixB = other.matrix;
+        
+        int rowsA = matrixA.length;
+        int columnsA = matrixA[0].length;
+        int columnsB = matrixB.length;
+        if (columnsB != columnsA) {
+            throw new RuntimeException("Размеры матриц не совпадают");
+        }
+        
+        int[][] matrixC = new int[rowsA][columnsB];
+        for (int i = 0; i < rowsA; i++) {
+           for (int j = 0; j < columnsB; j++) {
+               for (int k = 0; k < columnsA; k++) {
+                   matrixC[i][j] += matrixA[i][k] * matrixB[k][j];
+               }
+           }
+       }
+        
+        return new Matrix(matrixC);
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("Матрица\n");
+        for (int i = 0; i < matrix.length; i++) {
+            for (int j = 0; j < matrix[0].length; j++) {
+                sb.append(matrix[i][j]).append(' ');
+            }
+            sb.append("\n");
+        }
+        return sb.toString();
+    }
+
+    @Override
+    protected Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        return super.equals(obj);
+    }
+
+    @Override
+    public int hashCode() {
+        return super.hashCode();
+    }
+
+    
+}
diff --git a/src/module1/variant4/Task_2.java b/src/module1/variant4/Task_2.java
new file mode 100644
index 0000000..f5538c8
--- /dev/null
+++ b/src/module1/variant4/Task_2.java
@@ -0,0 +1,47 @@
+package module1.variant4;
+
+import java.util.ArrayList;
+import java.util.Random;
+
+/**
+ *
+ * @author aNNiMON
+ */
+public class Task_2 {
+    
+    public static void main(String[] args) {
+        Random rnd = new Random();
+        
+        Matrix mt1 = new Matrix(1, 3);
+        for (int i = 0; i < mt1.getColumnSize(); i++) {
+            mt1.setCell(0, i, rnd.nextInt(10));
+        }
+        
+        Matrix mt2 = new Matrix(3, 3);
+        for (int i = 0; i < mt2.getRowSize(); i++) {
+            for (int j = 0; j < mt2.getColumnSize(); j++) {
+                mt2.setCell(i, j, rnd.nextInt(10));
+            }
+        }
+        
+        Vector vector = new Vector(3);
+        for (int i = 0; i < vector.getVectorSize(); i++) {
+            vector.setCell(i, rnd.nextInt(10));
+        }
+        
+        
+        ArrayList<Matrix> list = new ArrayList<>();
+        list.add(mt1);
+        list.add(mt2);
+        list.add(vector);
+        
+        for (Matrix matrix : list) {
+            System.out.println(matrix.toString());
+        }
+        System.out.println("AxB= " + mt1.multiply(mt2).toString());
+        System.out.println("V*A= " + vector.getMultiplyMatrixAndVector(mt1).toString());
+        System.out.println("V*B= " + vector.getMultiplyMatrixAndVector(mt2).toString());
+        System.out.println("V*V= " + vector.getVectorScalarMultiply(vector));
+    }
+    
+}
diff --git a/src/module1/variant4/Vector.java b/src/module1/variant4/Vector.java
new file mode 100644
index 0000000..300c168
--- /dev/null
+++ b/src/module1/variant4/Vector.java
@@ -0,0 +1,73 @@
+package module1.variant4;
+
+/**
+ *
+ * @author aNNiMON
+ */
+public class Vector extends Matrix {
+    
+    public Vector(int size) {
+        super(new int[1][size]);
+    }
+    
+    public Vector(int[] vector) {
+        super(new int[][] {
+            vector
+        });
+    }
+
+    public int[] getVector() {
+        return matrix[0];
+    }
+    
+    public int getVectorSize() {
+        return matrix[0].length;
+    }
+    
+    public void setCell(int column, int value) {
+        super.setCell(0, column, value);
+    }
+    
+    public Vector getMultiplyMatrixAndVector(Matrix matrix) {
+        int[][] matrixA = matrix.getMatrix();
+        int rowsA = matrixA.length;
+        int columnsA = matrixA[0].length;
+        
+        int[] vector = getVector();
+        
+        if (vector.length != columnsA) {
+            throw new RuntimeException("Размер матрицы и длина вектора не совпадают");
+        }
+        int[] result = new int[rowsA];
+        for (int i = 0; i < rowsA; i++) {
+            for (int j = 0; j < columnsA; j++) {
+                result[i] += (matrixA[i][j] * vector[j]);
+            }
+        }
+        return new Vector(result);
+    }
+    
+    public int getVectorScalarMultiply(Vector other) {
+        int[] vectorA = getVector();
+        int[] vectorB = other.getVector();
+        
+        int result = 0;
+        for (int i = 0; i < vectorA.length; i++) {
+                result += vectorA[i] * vectorB[i];
+        }
+        
+        return result;
+    }
+    
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("Вектор\n");
+        for (int j = 0; j < matrix[0].length; j++) {
+            sb.append(matrix[0][j]).append(' ');
+        }
+        sb.append("\n");
+        return sb.toString();
+    }
+    
+}