$\int3xy^5dx$

$\int\:3e^{2q}sen\left(3q\right)dq$

$\frac{2x^3+x}{x+3}$

$\left(3\right)\sin^3\left(x-3\right)\sin\left(x+2\right)\cos^2\left(x\right)=\sin^2\left(x-3\right)\sin\left(x+3\right)$

$2x-39<65$

$\lim_{x\to0}\left(\frac{\left(5^x-4^x\right)}{3^x-2^x}\right)$

$4x^2+17x+28$