$\frac{7x}{x^2+5x-6}$

$\left(6.38\right)\cdot\left(-30.6\right)$

$\frac{dy}{dx}+\:\tan\left(x+3\right)=1$

$\left(\frac{1}{3}x\:-\frac{1}{2}\right)\left(\frac{1}{3}x-\frac{1}{4}\right)$

$\sqrt[3]{1+\frac{x}{3}}-\sqrt[4]{1+\frac{x}{4}}$

$\frac{17^{19}}{17^2}$

$\int arctan\left(7z\right)dz$