$7x^2\:-\:7x\:-\:13\:=\:0$

$-9-\left(-10+\left(15-25\right)\right)$

$\int_{7.364\cdot\:\:10^{-3}}^{8.482\cdot\:10^{-3}}\left(21\cdot\:sin\left(\frac{2\pi\:\:x}{0.015}\right)+6\right)^2dx$

$\frac{d}{dx}\frac{\left(\sin^2\left(x\right)\right)\left(\tan^2\left(x\right)\right)}{\left(x^2+2x\right)^3}$

$-16+49a^2$

$6ab+4b+ba$

$\left(36x^4y^6\right)^{\frac{1}{2}}$