$\left(1-t\right)^2+2t\left(1-t\right)+2t^2$

$\lim_{x\to0}\left(\frac{x+sen\left(x\right)}{x-cos\left(x\right)}\right)$

$6cos\left(\frac{x}{2}\right)=3$

$\left(2xy^4\right)^4\left(xy\right)^8$

$\frac{dy}{dx}=\frac{x}{x-1}$

$\frac{z^{-5}r^2}{r^3z^2}$

$3y^66y^2$