1. Carry out the multiplication of the expressions in each of the following:
(1)4x2 and (5x + 2)
(2)- 8x3 and (2x + 3)
(3) (3y-5x) and 7yx
(4) (-y2-x2) and 4xz
(5) (m2-n) and 4m
(6) (6m4-n5) and -5m
(7) (4-9y2) and xy
(8) (a2+ 9ab2) and -6a2b3
(9) (7p2 q2+ 5q2r2) and 16q4
(10)(-a2 + 1) and (-8a3)
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