$\frac{4}{x^2+3x-10}$

$20=\frac{x}{50}$

$\left(2m-3p\right)^3$

$\lim_{x\to0}\left(\frac{x-1}{x^n-1}\right)$

$-\:\left[\:b-\left(a-b\right)\right]-\left(-\:\left[\:-\left(b-a\right)\right]\right)$

$\frac{3dy}{dt}+y=2$

$\sin^2\left(x\right)-\cos^2\left(x\right)=1-2\cos\left(x\right)$