$-200x^2+240x+20$

$\int_{-\infty}^0\left(\frac{1}{\sqrt{1-3x}}\right)dx$

$2-s>-1$

$\frac{12x^5-6x^4+14x^3-30x^2+16x+9}{3x^3+2x+1}$

$\left(x^2-x+1\right)^2$

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

$\lim_{x\to1}\left(\frac{x^2-xlnx\:+\:lnx\:-1}{x\:-\:1}\right)$