$\int\frac{3x^2-5x+1}{2x+1}dx$

$\lim_{x\to90}\left(\frac{sen\left(x\right).\ln\left(\sin\left(x\right)\right)}{\cos\left(x\right)}\right)$

$36sec^4w-12sec^2w+1$

$\lim_{x\to\pi}\left(\frac{9+9\cos\left(3x\right)}{sin\left(4x\right)}\right)$

$3^2.6^6$

$\left(2x^4+3x^2-5x+2\right)-\left(-2x^2+4x-3\right)$

$\left(x+7\right)^5$