Question 238554
(8x+1)*4x^2 = 32x^3+4x^2  (1)   
(8x+1)*4x = 32x^2+4x      (2)
(8x+1)*4  = 32x+4         (3)

Add (1),(2), & (3) together gives:

32x^3+36x^2+36x+4

Algebraic division is not my strong point so maybe another tutor can step in from here?