HP 40gs how to get a submartix from a matrix

[Anthony The Koala]

Dear Thomas,
To get an invervse of a matrix P

import numpy as np
from numpy.linalg import inv
from sympy import latex

#code to calculate the matrix
#
#defined M1, M and M3
P = M2@M@M3
P = np.matrix(P)

#prints the output of latex output. Normally output to a tex file
print(latex(inv(P)))

Thank you
Anthony, Sydney