$\lim_{x\to\infty}\left(\frac{6x^2-6x-5}{3x^2+3x^2-9x+13}\right)$

$\int\frac{\sqrt{16-t^2}}{t^2}dx$

$\sin^5x\cos^2d$

$\int\left(\frac{6x^3+2x^2-x}{x^5}\right)dx$

$\frac{x-3}{2}-\frac{1}{3}\left(2-x\right)>3$

$6:2-2\left(3-1\right)$

$\lim_{x\to2}\frac{ln\left(9-4x\right)}{x^2}$