$\lim_{x\to\frac{\pi}{2}}\left(xsin\left(\frac{\pi}{x}\right)\right)$

$5\left(y+4\right)-3y$

$\left(3a^3+8b^4\right)^4$

$\lim_{x\to-\infty}\left(\frac{ln\left(x^4-3\right)}{13x+5}\right)$

$2x^2\:-3xy\:+\:2x\:x\:2x\:-\:4y$

$w^3\cdot w^{-9}$

$\int\frac{\left(x^2\right)}{\left(x+7\right)^9}dx$