$\frac{x^9}{x^5}$

$\sin\left(2x\right)=\frac{2}{5}$

$\left(2x+1\right)dx=-\left(3y+7\right)dx$

$\lim_{x\to0}\left(\frac{\left(2-x\right)^2-8}{x}\right)$

$\frac{\sec\left(\pi\right)+\tan\left(\pi\right)}{\cos\left(\pi\right)+\cot\left(\pi\right)}=\sec\left(\pi\right).\tan\left(\pi\right)$

$\int_1^x\left(xt\right)dt$

$3\left(d+\frac{5}{3}\right)$