code: def _eval_derivative_matrix_lines(self, x):
      from sympy.tensor.array.expressions.array_expressions import (
          ArrayContraction,
      )
      from ...tensor.array.expressions.array_expressions import (
          ArrayTensorProduct,
      )
      from .matmul import MatMul
      from .inverse import Inverse
  
      exp = self.exp
      if self.base.shape == (1, 1) and not exp.has(x):
          lr = self.base._eval_derivative_matrix_lines(x)
          for i in lr:
              subexpr = ExprBuilder(
                  ArrayContraction,
                  [
                      ExprBuilder(
                          ArrayTensorProduct,
                          [
                              Identity(1),
                              i._lines[0],
                              exp * self.base ** (exp - 1),
                              i._lines[1],
                              Identity(1),
                          ],
                      ),
                      (0, 3, 4),
                      (5, 7, 8),
                  ],
                  validator=ArrayContraction._validate,
              )
              i._first_pointer_parent = subexpr.args[0].args
              i._first_pointer_index = 0
              i._second_pointer_parent = subexpr.args[0].args
              i._second_pointer_index = 4
              i._lines = [subexpr]
          return lr
      if (exp > 0) == True:
          newexpr = MatMul.fromiter([self.base for i in range(exp)])
      elif (exp == -1) == True:
          return Inverse(self.base)._eval_derivative_matrix_lines(x)
      elif (exp < 0) == True:
          newexpr = MatMul.fromiter(
              [Inverse(self.base) for i in range(-exp)]
          )
      elif (exp == 0) == True:
          return self.doit()._eval_derivative_matrix_lines(x)
      else:
          raise NotImplementedError(
              "cannot evaluate %s derived by %s" % (self, x)
          )
      return newexpr._eval_derivative_matrix_lines(x)
  
imports: from .matexpr import MatrixExpr
  from .special import Identity
  from sympy.core import S
  from sympy.core.expr import ExprBuilder
  from sympy.core.cache import cacheit
  from sympy.core.power import Pow
  from sympy.core.sympify import _sympify
  from sympy.matrices import MatrixBase
  from sympy.matrices.exceptions import NonSquareMatrixError
label_desc: Use image node_id 12 for calling the MatPow obj's underlying member method code with example usage: obj._eval_derivative_matrix_lines(x) and returns: newexpr, lr, Inverse, self