$\frac{dy}{dx}=\frac{5x}{1+2y}$

$\lim_{x\to\infty}\left(tan\left(\left(\frac{2x\pi}{1+3x}\right)\right)\right)$

$3a\:x\:\left(7b-2b\right)$

$1-b+2a\left(1-b\right)=\left(1-b\right)\left(1+2a\right)$

$\int\sqrt{x}sen^2\left(x^{\frac{3}{2}}-1\right)dx$

$-3+7-8-4-2-4+9$

$0=x^2+6x+4\:$