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

$\frac{1}{2}x^2y\left(4x^5y^2+3x-7y^2\right)$

$\left(2x^3+xy^2\right)+\left(yx^2+2y^3\right)y'=0$

$\lim_{x\to0}\left(\frac{sin6x}{x}\right)$

$\lim_{x\to2}\left(\frac{1}{2+x-x^2}-\frac{2}{16-x^4}\right)$

$2x+\frac{-6x+12}{x^2-4}$

$x^2-7x-3$