数学计算题酷爱戳进来!直接写出结果也是可以的--毕竟窝只想校对一下（2a-b)(a+2b-3)(x+y+5)(x+y+4)(x-y)^2-(x+y)^2(3a-b)^2+(b+3a)^2(2x-1)(2x+1)(4x^2+1)(2m+3n)^2(3n-2m)^24(a+2)^2-7(a+3)(a-3)+3(a-1)^2(2a-b-3)(2a+b-3)5a^2b·(-2a

Question

数学计算题酷爱戳进来!
直接写出结果也是可以的- -毕竟窝只想校对一下
（2a-b)(a+2b-3)
(x+y+5)(x+y+4)
(x-y)^2-(x+y)^2
(3a-b)^2+(b+3a)^2
(2x-1)(2x+1)(4x^2+1)
(2m+3n)^2(3n-2m)^2
4(a+2)^2-7(a+3)(a-3)+3(a-1)^2
(2a-b-3)(2a+b-3)
5a^2b·(-2ab^3)
(-2x^3y)^2·(-x^2y^2)
4x^2y(3xy^2z-7xz)
(2a^2+ab-2b^2)·（-1/2ab)
(2x+3y)(4x+7y)
(a+9)(a+1)
(5-2x)(2x+5)
(-3a+2b)(-3a-2b)
(3/4x-4/3y)^2
(0.5a+1/3b)^2
(-2a^2-7b)^2
(-8b+1/4)^2

Answer 1

2a²+3ab-6a-2b²+3b
x²+y²+2xy+9x+9y+20
-4xy
18a²+2b²
16x^4-1
16m^4+81n^4-72m²n²
10a+82
4a²-12a-b²-9
-10a³b^4
-4x^8y^4
12x³y³z-28x³yz
-a³b-a²b²+ab³
8x²+26xy+21y²
a²+10a+9
25-4x²
9a²-4b²
9/16x²+16/9y²-2xy
1/4a²+1/9b²+1/3ab
4a^4+49b²+28a²b
64b²+1/16-4b