Giải: 3x + 5/x^2 - 5x + 25 - x/25 - 5x

n, 3x+5/x^2-5x + 25-x/25-5x

h,x^2+1 - x^4-3x^2+2/x^2-1  

i,3/2x+6 - x-6/2x^2+6x

t,4x^2-3x+17/x^3-1 + 2x-1/x^2+x+1 + 6/1-x

v,x+9y/x^2-9y^2 - 3y/x^2+3xy

s,x/x-1 - 2/x+1 - 2/x^2-1

ai giúp nhanh hộ 4h30p đi hc rồi