$\lim_{x\to\infty}\left(\frac{x^6+3}{x^6-6}\right)$

$\left(-4\right)\left(7\right)\left(-6\right)-\left(-4\right)\left(9\right)+\left(2\right)\left(-1\right)\left(0\right)$

$2000\left(1.025\right)^0$

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

$2x^2yz-2xyz+2x^2y^2$

$\int\left(\frac{1}{\left(x\left(x^2+1\right)\right)}\right)dx$

$\lim_{x\to\infty}\left(\frac{x+2}{x-1}\right)^2$