$-6\left(-4\:+\:y\right)$

$\frac{\sin\left(2x\right)-2\sin\left(x\right)}{1-\cos\left(x\right)}$

$a^4+b^4-a^2-b^2+2ab\left(ab-1\right)$

$\cot^2x+3cscx=-3$

$10x\left(-\frac{1}{2}\right)$

$-1076-860$

$\int_{-\pi}^{\pi}\left(\sin\left(\frac{\left(4x+9\pi\right)}{18}+3\pi\right)\right)dx$