$\int\frac{cos6x}{3-2sen6x}dx$

$\int cos7xsen2xdx$

$\left(cosx\right)^4\left(cosy\right)^4+\left(sinx\right)^4\left(cosy\right)^4+\left(siny\right)^4$

$\frac{a+5}{a+4}-\frac{4a-8}{a^2+6a+8}$

$e^{4x}\frac{dy}{dx}=x$

$-3^3-4-3^2-5-3-9$

$x+6>2\left(x+1\right)-3\left(x-3\right)$