$2x^2+2y^2$

$\int\left(1+cos\left(x\right)\right)^3\left(cos\left(x\right)\right)^2\left(sin\left(x\right)\right)dx$

$y=\sqrt{2x}$

$x\frac{dy}{dx}+2x^2y$

$\int\left(cos3x\:cos5x\right)dx$

$\csc\left(x\right)=4.3$

$\lim_{x\to\infty}\left(\frac{\sin\left(x\right)}{2x-3}\right)$