$\left(x+4\right)\left(x+2\right)=20$

$\frac{dy}{dx}=\frac{3y^2+4x^2}{xy}$

$\int_0^{a^{\frac{1}{2}}}\left(x^3\sqrt{a^2-x^4}\right)dx$

$3 x ^ { 3 } - 6 x$

$\int\left(\frac{arcsec2x}{\sqrt{1-4x^2}}\right)dx$

$\left(3m+2\right)\left(2m-2\right)$

$\left|-41\right|-\:\left|18\right|+12$