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( 2x+3)2 – (4 – 3x)2 -3 (2x-1)(2x+1)
(3x -4y)(3x+4 y)- x2(1-3y)+ y(2x2- 4)
x3 : x – 3x2
2x(3- x) – x(2x + 3)
(2x-3)(2-x).
(3x2 +x- 2)2
(2√5+√6)^2-2(√30+1)^2+2(4√2-√30)(4√2+√30)