(-5x2y) (3/2 y4)
(2/3 a3b) (1/2 a2b2)
(4/7 a2b) (a3) (-8b3)
(-2/5 x2y2) (-6/7 x3y)
(2) (-5x2a) (6x3b)
-32/7 a5b3
-60x5ab
-15/2 x2y5
-12/35 x5y3
1/3 a5b3
