$\frac{dy}{dx}=cos\left(5x\right)$

$\lim_{x\to-4}\left(\frac{3x^2+9x-12}{x+4}\right)$

$\frac{d}{dx}\left(x+2\right)^5\left(4x-7\right)^4$

$\frac{27}{\sqrt{5}}\frac{x^2}{2}$

$\left(-5x^2-10x-7y+2\right)+\left(3x^2-4+7x\right)$

$\sqrt{x+y}=x$

$\int\:\left(\sqrt{x}+1\right)\left(\sqrt{x}+x-1\right)dx$