code: def complex_mult(A, c, d):
      a, b = A[..., 0:1], A[..., 1:2]
      ro = a * c - b * d
      co = a * d + b * c
      return ro.cat(co, dim=-1)
  
imports: from typing import Tuple, Union, Optional, Dict
  from tinygrad import Tensor, Variable, TinyJit, dtypes, nn, Device
  from tinygrad.helpers import getenv
label_desc: Use image node_id 2 for calling a global function with example usage: complex_mult(A, c, d) and returns: ro