$\lim_{x\to0}\left(\frac{3x+sen\left(x\right)}{2x-tan\left(x\right)}\right)$

$\int_c^x\left(\ln\left(2+x^2\right)\right)dx$

$\left(6a+2b-3c\right)\left(-5a^2-2b^2-6c^2\right)$

$x^3-x^2=2x+y$

$a\left(c+d\right)+\:b\left(a+b\right)+c\left(b+c\right)$

$\frac{80}{2}$

$\left(y+3x^2\right)\left(y+3x^2\right)$