$1-\csc^2a=-\cot^2a$

$\left(n^3+2\right)\left(-2+n^3\right)-\left(n^3+1\right)\left(n^3-2\right)$

$10x^6-5x^2+5$

$\left|\left(1+x^2\right)-1\right|$

$8z^3-64w^3$

$\int_x^x\frac{1}{12}\left(x-7\right)dx$

$-10a\left(8a-4b+2c\right)+\left(5a-4b-2c\right)-\left(10a-3b-4c\right)$