Simplify:
a) (-2x(^-1)+x(^2))^-2
b)(3x(^-1)+2y(^-1))^-2
c) (5(^x-4))^2(3(^-2x)^5(3^2)(^3x)/5^3(3)(5(^x+1)
I hope someone can figure out what I have typed here because I am in