Question

数学：如图

Answer 1

1,-(x^3)/3
2,36*(x*z/y^2)
3,(x-3)/(x+2)
4,2y

Answer 2

(-x/3y)²*(-3xy²)³
=x/9y²*(-27x³y^6)
=-3x²y:^4

8x²y²*(-3x/4y³)*(-6z/x²y)
=9xz/y²

(x-2)/(x+3)*(x²-9)/(x²-4)
=(x-2)/(x+3)*(x-3)(x+3)/(x-2)(x+2)
=(x-3)/(x+2)

2x³y^-3*x²y^-4
=2x^5y^-7