$\lim_{x\to\infty}\left(\frac{ln3x}{e^7x}\right)$

$-3n+7+6n-2$

$\int\:\left(2x^5\:-\:\frac{5}{x}\right)dx$

$\lim_{x\to\pi}\left(\frac{sen\left(x\right).\ln\left(\sin\left(x\right)\right)}{\cos\left(x\right)}\right)$

$\int\frac{x+3}{x^2+4x+13}dx$

$\int_{29}^{\infty}\left(\frac{49cosx}{-20x}\right)dx$

$( q ^ { s } ) ^ { 3 }$