$-4\left(3\right)^2+4\left(3\right)-4$

$\frac{10x}{3y}x\frac{9y}{2}$

$-3\int\left(-\frac{1}{6}\cos\left(x\right)+12^x-\frac{2\sec^2\left(x\right)}{\tan\left(x\right)}\right)dx$

$18x^3+30x^2-12x^4$

$\int\left(\frac{8}{5t\sqrt{25t^2-25}}\right)dt$

$\left(14x^2+20x\right)\left(14x^2-20x\right)$

$\csc\left(x\right)=-3.1$