$\lim_{x\to\infty}\left(\frac{x+3^x}{x+2^x}\right)$

$\left(3y+7\right)\left(3y-4\right)$

$5.3279:\:64$

$\left(2\sqrt{2}+3x+\sqrt{2}\right)\left(2\sqrt{2}+3x-\sqrt{2}\right)$

$3tan^2\left(x-1\right)=0$

$\:\frac{3sin\left(x-y\right)}{cos\left(x\right)cos\left(y\right)}$

$\int9x^8\left(x^9-4\right)dx$