$y^2+e^xy$

$\lim_{x\to0}\left(\frac{\frac{-x}{logx}}{x}\right)$

$\frac{9}{3}c+\frac{1}{4}c+\frac{5}{3}a+\frac{4}{2}b-9b-3c$

$4x^2+12x-8$

$\int\frac{2}{x\sqrt{3-n^2}}dx$

$4x^5+\left(\frac{\left(2x^2\right)}{\left(8x^3+9\right)}\right)$

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