static void Main(string[] args)
{
double[,] ex = new double[3, 3] {
{ 1, 2, 3 }, { 4, 5, 6 }, { -2, 4, -7 }
};
double[,] ex2 = new double[3, 3] {
{ 2, 3, 4 }, { 4, 5, 6 }, { -2, 4, -7 }
};
TSMatrix a = new TSMatrix(3, ex);
TSMatrix b = new TSMatrix(3, ex2);
TSMatrix c = new TSMatrix(4);
a.LowerGreaterValues();
b.GetSum();
(b + a).Output();
}