3 (2x-5) =

2x (-4x+3) =

2a(3a-5b) =

5a (-4a -5b)

(2+x)(5-x)=

(2x-1)(3x+2) =

(1-3x)(5-x)=

(-2x+3)(-5x-4) =

( 3x - 1 ) ( 2 - 5x )

3 ( 5x + 2 )

(2a+b)(a+2b)=

(5-a)(5-a) =

A = 2x + (2x-3) - (3x+2) - (2-3x)

B = 2x (2x-3) - (3x+2) (2-3x)

C = 2x + (2x-3) (3x+2) - (2-3x)

D = (2x-3) (2x-3) – 4x (3x+2) – 3x (-2-3x)