$\left(13x+4y\right)\left(2x-3y\right)$

$\left|3\right|^2+\left|3\right|-10$

$\left(2s-2\right)\left(s-5\right)$

$2x+y;\:x=7;\:y=10x$

$\int\frac{\left(4x\right)}{\left(16x^2+1\right)^{\frac{3}{2}}}dx$

$\frac{d}{dx}4x^2y^3-\:10x^2y=6$

$\lim_{x\to\infty}\left(\frac{e^x}{2x+\ln\left(5x\right)}\right)$