code: def get_matrix_of_minors(m):
      """get the matrix of minors and alternate signs"""
      matrix_of_minors = [
          [0 for i in range(len(m))] for j in range(len(m))
      ]
      for row in range(len(m)):
          for col in range(len(m[0])):
              if (row + col) % 2 == 0:
                  sign = 1
              else:
                  sign = -1
              matrix_of_minors[row][col] = sign * get_determinant(
                  get_minor(m, row, col)
              )
      return matrix_of_minors
  
imports: import fractions
label_desc: Use image node_id 3 for calling a global function with example usage: get_matrix_of_minors(m) and returns: matrix_of_minors