Command line:

$ python --version
Python 3.7.0

$ python -m pip install --user sympy

Octave:

>> pkg load symbolic

>> A=[1 2 0 -1 5; 2 0 2 0 1; 1 1 -1 3 2; 0 3 -3 2 6]
A =

   1   2   0  -1   5
   2   0   2   0   1
   1   1  -1   3   2
   0   3  -3   2   6

>> A=sym(A)
A = (sym 4×5 matrix)

  ⎡1  2  0   -1  5⎤
  ⎢               ⎥
  ⎢2  0  2   0   1⎥
  ⎢               ⎥
  ⎢1  1  -1  3   2⎥
  ⎢               ⎥
  ⎣0  3  -3  2   6⎦

>> rref(A)
ans = (sym 4×5 matrix)

  ⎡1  0  0  7/3    0 ⎤
  ⎢                  ⎥
  ⎢0  1  0  -5/3  5/2⎥
  ⎢                  ⎥
  ⎢0  0  1  -7/3  1/2⎥
  ⎢                  ⎥
  ⎣0  0  0   0     0 ⎦

# posted by rot13(Unafba Pune) @ 3:54 PM