$\frac{\left(27x^2-36xy+12y^2\right)}{108}$

$\left(-2x^2+4x^3-\frac{1}{3}\right)\cdot\left(x^3+6x-7\right)$

$\left(169x^4y^6-81x^2y^4\right)\left(13x^2y^3-9xy^2\right)$

$\frac{dy}{dx}\left(x^2-8xy+y^2=8\right)$

$\frac{11\pi\:+11\cdot\:\:0.42611}{2\pi}$

$\sqrt{2x-1}=\sqrt{x+2}$