Matrix:
[ -20  64
  -35  128  ]

    @Override
    public String toString() {
        StringBuilder out = new StringBuilder();
        out.append("Matrix:\n[ ");
        for (int i = 0; i < rowCount * colCount; i++) {
                out.append(data[i]);
                if (i != rowCount * colCount - 1) {
                    out.append(" ");
                }
        }
        out.append(" ]");
        return out.toString();
    }

--- a/src/main/java/matrix/Matrix1D.java
+++ b/src/main/java/matrix/Matrix1D.java
@@ -87,22 +87,13 @@ public class Matrix1D {
     public String toString() {
         StringBuilder out = new StringBuilder();
         out.append("Matrix:\n[ ");
-        for (int i = 0; i < rowCount; i++) {
-            if (i != 0) {
-                out.append("\n");
-                out.append("  ");
-            }
-            for (int j = 0; j < colCount; j++) {
-                out.append(data[i * colCount + j]);
-                if (j == colCount - 1) {
-                    continue;
-                }
-                for (int k = 0; k < getMaxLength() - getIntLength(data[i * colCount + j]) + 2; k++) {
+        for (int i = 0; i < rowCount * colCount; i++) {
+                out.append(data[i]);
+                if (i != rowCount * colCount - 1) {
                     out.append(" ");
                 }
-            }
         }
-        out.append("  ]");
+        out.append(" ]");
         return out.toString();
     }