code: def test_ops():
      assert pixel(ImageMath.eval("-A", images)) == "I -1"
      assert pixel(ImageMath.eval("+B", images)) == "L 2"
  
      assert pixel(ImageMath.eval("A+B", images)) == "I 3"
      assert pixel(ImageMath.eval("A-B", images)) == "I -1"
      assert pixel(ImageMath.eval("A*B", images)) == "I 2"
      assert pixel(ImageMath.eval("A/B", images)) == "I 0"
      assert pixel(ImageMath.eval("B**2", images)) == "I 4"
      assert pixel(ImageMath.eval("B**33", images)) == "I 2147483647"
  
      assert pixel(ImageMath.eval("float(A)+B", images)) == "F 3.0"
      assert pixel(ImageMath.eval("float(A)-B", images)) == "F -1.0"
      assert pixel(ImageMath.eval("float(A)*B", images)) == "F 2.0"
      assert pixel(ImageMath.eval("float(A)/B", images)) == "F 0.5"
      assert pixel(ImageMath.eval("float(B)**2", images)) == "F 4.0"
      assert (
          pixel(ImageMath.eval("float(B)**33", images))
          == "F 8589934592.0"
      )
  
imports: from __future__ import annotations
  import pytest
  from PIL import Image, ImageMath
label_desc: Use image node_id 3 for calling a global function with example usage: test_ops() without return types