$\int\:\frac{x-1}{\:\sqrt{x^2+1}}dx$

$\frac{60x^4y^2z^3}{-12xyz^2}$

$\lim_{x\to\infty}\left(\frac{2}{x^2-3}\right)$

$\left(3x-4\right)\left(x^2+6x+3\right)$

$\lim_{x\to-\infty}\left(\frac{4x^4+x^2+5x}{\sqrt{64x^8+x^6}}\right)$

$1.4489\cdot4$

$\left(9x^2y^3-6x^3y^4\right)\left(9x^2y^3+6x^3y^4\right)$