Find the derivative of \(y=\frac{x^7 - x^5}{x^4}\)

Differentiate sin x - x cos x

Find the minimum value of the function y = x(1+x)

Evaluate \(\int_1 ^2(6x^2-2x)dx\)

Evaluate \(\int^{\frac{\pi}{2}} _{\frac{-\pi}{2}} cos x dx\)