$x^2+9x=4$

$\left(5\right)^3\left(m\right)^3\left(n\right)^3$

$\left(5x^2-3x+8\right).\left(2x^2+6x-1\right)$

$y'=6\cos\left(\pi x\right)$

$\frac{dy}{dx}=\left(50-4x\right)e^{\frac{-y}{5}}$

$\lim_{x\to\infty}\left(\frac{4x^2+3x+1}{2x^2-5}\right)$

$\int\:\left(\left(\sqrt[4]{x}+2\right)\left(2-\sqrt{x}\right)\right)dx$