$\tan^2x-4\tan x=0$

$\frac{dy}{dx}\left(7y=x^2y^3+sec\left(y\right)\right)$

$\int_0^{\frac{x}{2}}\left(\frac{2sin\left(2t\right)}{8-cos\left(2t\right)}\right)dt$

$\left(x^3y^5z^7-2a^3b^4c^5\right)^3$

$x^{-\frac{1}{2}}^{+1}$

$\frac{\left(\sqrt[4]{9}\sqrt[6]{x^5}\right)}{x}$

$28\cdot15$