$\frac{16-4x^2}{3-2x-x^2}$

$\lim_{x\to\infty}\left(\frac{3x^4-2x^2+7}{5x^3+x-3}\right)$

$5b\left(6b-10\right)$

$-1x^2+8x-12$

$\frac{2x^3-3x+2}{x+1}$

$\int_0^2\left(30+4t\right)e^{-.1t}dt$

$\tan\left(x\right)+\cot\left(x\right)=\frac{\cot\left(x\right)}{1-\sin^2\left(x\right)}$