$\int\left(x^2sin\left(x^4\right)\right)dx$

$\lim_{x\to-2}\frac{x^2-3x-10}{x+2}$

$\frac{2x^2+x-1}{x^2-1}$

$\lim_{x\to0}\left(\frac{\sin\left(q+x\right)-\sin\left(q\right)}{x}\right)$

$5a^2-35a+50$

$\left(2\cdot\frac{1}{2}+3\cdot\frac{2}{3}\right)\left(4\cdot\frac{1}{4}+2^2\right)$

$\int\frac{4}{\left(\sqrt{x^2+16}\right)}dx$