(a+5)(b+5) (3x-y)(2x+3y) (3x-2)(2x-3)(x+2) (四分之三xy²)² (2ab²)x(-3a)

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(a+5)(b+5)(3x-y)(2x+3y)(3x-2)(2x-3)(x+2)(四分之三xy²)²(2ab²)x(-3a)(a+5)(b+5)(3x-y)(2x+3y)

(a+5)(b+5) (3x-y)(2x+3y) (3x-2)(2x-3)(x+2) (四分之三xy²)² (2ab²)x(-3a)
(a+5)(b+5) (3x-y)(2x+3y) (3x-2)(2x-3)(x+2) (四分之三xy²)² (2ab²)x(-3a)

(a+5)(b+5) (3x-y)(2x+3y) (3x-2)(2x-3)(x+2) (四分之三xy²)² (2ab²)x(-3a)
(a+5)(b+5)
=ab+5a+5b+25
(3x-y)(2x+3y)
=6x²+7xy-3y²
(3x-2)(2x-3)(x+2)
=(6x²-13x+6)(x+2)
=12x³-13x²+6x+12x²-26x+12
=12x³-x²-20x+12
(四分之三xy²)²
=16分之9x²y^4
(2ab²)x(-3a)
=-6a²b²

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