$\left(\sec\left(\theta\right)+1\right)\left(\sec\left(\theta\right)-1\right):\sec\left(\theta\right)$

$\frac{2x}{6}x\frac{2}{5}$

$\sqrt[3]{a}+\sqrt[3]{b}+\sqrt[3]{c}=0$

$\int\frac{\left(\sqrt{x\:}-7\right)^2}{\sqrt{x}}dx$

$\sin\left(a+b\right)\cos a+\cos\left(a+b\right)\sin a$

$\sqrt{-\left(x^2+x-1\right)}$

$\left(x^2-y^2\right)dx\:-2xy\cdot dy$