$\lim_{x\to\infty}\left(\frac{\sqrt{x+9}-3}{x}\right)+\frac{17}{6}$

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

$a^3+b^3-a^3+2b^3$

$2\sin\theta\cos\theta=\cos\theta$

$\int\frac{3x^2+2}{\left(5-2x\right)^2\left(x^2+10x+26\right)}dx$

$\sqrt[4]{1024}$

$\left(9a^7+4bc^4\right)^2$