Solve system of linear equations : solve_equations. The solver of systems of linear equations allows to solve equations with several unknowns: system of equations with 2 unknowns, system of equations with 3 unknowns, system with n unknowns.
Sum matrix calculator : matrix_sum. This matrix calculator allows to calculate online the sum of two matrix with calculation step.
Trace of a matrix : trace. The matrix calculator calculates online the trace of a matrix.
The trace of a square matrix is equal to the sum of the terms of its diagonal.