$\int_{\frac{\pi}{4}}^{\frac{\pi}{4}}\cos\left(x\right)^4dx$

$\left(-y^2+3y\right)\left(3y+y^4\right)$

$\sqrt[a-b]{4^{2a}}+12\left(\sqrt[a-b]{4^{2b}}\right)$

$\int\frac{12}{\sqrt{1+4x}}dx$

$4c^2+7d^7-10c^2+3d^7$

$x\left(\frac{dy}{dx}\right)+x^3y=0$

$2x-2\sqrt{3x^2}+2$