$2a-2a$

$\left(10^2.7^5\right)^5$

$\int x^3\left(x^4-2\right)^5dx$

$\frac{ab}{c}+\frac{ac}{b}-\frac{bc}{a}$

$\lim_{x\to\infty}\left(\frac{\log\left(n\right)}{ln\left(n\right)}\right)$

$\frac{\left(17^3\right)^6\cdot17^{-10}}{17^8}$

$\lim_{x\to\infty}\left(\frac{x^2+11x+30}{-35-2x+x^2}\right)$