$\left(2xy^2+3\right)dx+\left(2x^2y-4\right)dy=0$

$6+\left(81+35\right)+2.9-\left(8-7\right)$

$e^{2x}\left(2\cos\left(y\right)dx-\sin\left(y\right)dy\right)=0$

$\frac{dy}{dx}=-\frac{e^{-y}cos\left(x\right)}{sin^2x}$

$3x^2+5x+4=y$

$\int_1^2\left(csc\left(x\right)\left(sec\left(x\right)\right)^2\right)dx$

$\frac{x^2+10+16}{x^2-4}$