$8x^3-16x^2+40x-80$

$\lim_{x\to\infty}\left(\frac{x+\ln x}{x^4+e^x}\right)$

$\left(\frac{3}{4}a^3b-2c^2\right)^2$

$cos\left(x\right)csc\left(x\right)+\left(-cos\left(x\right)cot\left(x\right)\right)sin\left(x\right)$

$\left(4y^2-3x^2\right)^5$

$u^2+10uv+25u^2-4t^2$

$\sec\left(x\right)^2\cdot\tan\left(x\right)^2\cdot\csc\left(x\right)^2$