$12x^2n+6xa+24xy$

$\int\ln\left(3x-2\right)dx$

$\lim_{x\to0}\left(\frac{\sin\left(\theta\:\right)-\tan\left(\theta\:\right)}{\sin^2\left(\theta\:\right)}\right)$

$\frac{cos^2\left(x\right)}{sen^4\left(x\right)}$

$-32+15-45+81+34-15-45-81-34$

$\int\frac{1}{x\left(1+2x\right)}dx$

$\frac{x^2}{x^2+6}$