$121x^2-6.25$

$\frac{1+\csc\left(a\right)}{\sec\left(a\right)}=\cos\left(a\right)+\cot\left(a\right)$

$\int\frac{2x^2+5x+18}{x^3+9x}dx$

$\int\csc^2\left(2t\right)dt$

$\left(x-2\right)\left(x-3\right)\le x\left(x-1\right)-8$

$-6n=-8n-2$

$\sqrt[3]{81z\left(4\right)}x\left(6\right)y\left(5\right)$