$\int\arcsin\left(2w\right)dw$

$\lim\:_{x\to\:\frac{\pi\:}{4}}\left(\frac{sec^2\left(x-2\right)}{tan\left(x-1\right)}\right)$

$\int\left(tan^{-1}\right)\left(x^8\right)dx$

$\int2x\cdot\cos\left(9x\right)dx$

$\frac{19}{18}x-\frac{95}{6}=0$

$a^2+7a-6$

$a3-5a+1\:entre\:a+2$