$\lim_{x\to1}\left(\frac{x^{9a}-9ax+9a-1}{\left(x-1\right)^2}\right)$

$1+\sin\left(b\right)=2\cos\left(b\right)^2$

$7\left(x^2+2x-4\right)$

$-14.4+14+18.3-2.1$

$\int\:\left(2-3x^2\:-\:8x^3\right)dx$

$\left(2x^2y\:\:3xy^2\right)^2$

$-8=3+v$