$2\csc x\cot\frac{1}{2}x+\csc\left(\frac{1}{2}\right)x$

$\left(2\right)\left(3a+5b\right)^3$

$\int\left(9x+6\right)^2\left(9\right)dx$

$\lim_{x\to infinitp}\left(\frac{x-2x^2}{2x^2+5x}\right)$

$\int\frac{sin\left(2t+9\right)}{cos^2\left(2t+9\right)}dt$

$\left(7x^7y^{-1}\right)^2$

$\left(8b^5w^2-6cb^4w^3\right)^2$