code: def _expm_inner(E, A, A2, A4, A6, b):
      u1 = b[13] * A6 + b[11] * A4 + b[9] * A2
      u2 = b[7] * A6 + b[5] * A4 + b[3] * A2 + b[1] * E
  
      v1 = b[12] * A6 + b[10] * A4 + b[8] * A
      v2 = b[6] * A6 + b[4] * A4 + b[2] * A2 + b[0] * E
      return u1, u2, v1, v2
  
imports: import math
  import cupy
  from cupy.linalg import _util
label_desc: Use image node_id 3 for calling a global function with example usage: _expm_inner(E, A, A2, A4, A6, b) and returns: u1,  u2,  v1,  v2