$x\:+\:.25\:+\:5\:+\:2$

$\int\left(x^5-3\right)^2dx$

$\frac{sen\left(-x\right)+tg\left(-x\right)}{senx+tgx}$

$11sinb-1=3sinb-1$

$n.8n=392$

$\cos\left(x\right).\sin\left(x\right).\sec\left(x\right)=1$

$\lim\:_{x\to\:0}\left(\frac{sin\left(2x\right)}{2x}\right)^{\frac{1}{x}}$