giúp mik nhé mn mai mik thi rồi

A. `1/x - a/5 (b+2)`

→ 1/x - a/5*(b+2)

B. `15x^3+20x+7`

→ 15*x*x*x+20*x+7

C. `(20-15)2`$\neq$`25`

→ (20-15)*2<>25

D. `15-8≥3`

→ 15-8>=3

E. `frac{9}{2x+3}``-frac{8}{(x-y)^3}``+y`

→ (9/(2x+3))-(8/(x-y)*(x-y)*(x-y))

F. `25x^2+30x+9`

→ 25*x*x+30*x+9

$#batluc209$