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

$\frac{1x-3y}{3}+\frac{1x+3y}{3}$

$\lim_{x\to0}\left(\left[1+\frac{1}{5x}\right]\right)^x$

$\left(5x-2\right)^2\cdot\left(4x+4\right)^2$

$f\left(x\right)=8x^4-7x^2+5x$

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

$\lim\:_{x\to\:\:-1}\left(3x^3-2x^2+5x+3\right)$