$\left(1-cos\left(x\right)\right)\frac{dy}{dx}+\left(2sen\left(x\right)\right)y=tanx$

$64-9x^2$

$\frac{7x^2-3x^4+1}{x-1}$

$\int\frac{6}{1+x^4+2x^2}dx$

$\lim_{x\to\infty}\left(\frac{x^3-2x+3}{5-2x^2}\right)$

$\int_1^{+\infty}\left(\frac{x}{9+x^2}\right)dx$

$x^4y^{-3}$