$\int\frac{x^2}{x^2+16}dx$

$\left(-2m\right)\cdot\left(3m^2-2m+1\right)$

$\lim_{x\to-9}\left(\frac{x+3}{\left|x+3\right|}\right)$

$\ln\left(\left(2x^3+3x^2\right)^5\left(21x^3-10\right)\right)$

$\frac{4}{2^2}$

$\left(x+10\right)\left(x+5\right)-x^2-15x$

$\lim_{x\to\frac{\pi}{3}}\left(\frac{\sin\left(3x\right)}{1-2\cos\left(x\right)}\right)$