$2a^2+6-80$

$1+cot\left(x\right)\:tan\left(y\right)$

$\left(a+l\right)\cdot\left(a-l\right)$

$\frac{\left(-27\right)^3.32^{-5}.\left(-8\right)^5.\:\left(25^2\right)^{-6}}{\left(-74\right)^4.\:\left(-50^3\right)^4}$

$\frac{d^3}{dx^3}\left(-11\cdot\cos\left(x\right)\right)$

$\left(-m^4n\right)^2\left(-m^5\right)^2$

$\frac{dy}{dx}\arcsin\left(xy\right)$