$\frac{b-a}{n}+\frac{m-b}{d}+5a$

$y'=\frac{x}{1+x^2}$

$\lim_{x\to0}\left(ln\:\left(2-e^x\right)\right)$

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

$y=3-4x-x^2$

$\int\left(\frac{1}{2}+\frac{x}{3}+\frac{x^2}{4}+\frac{x^3}{5}\right)dx$

$\frac{2}{3}x^2+2x^2-3x^2+5$