$\frac{sin^2\left(x\right)-2\sin\left(x\right)+1}{sin\left(x\right)-1}=sin\left(x\right)-1$

$\int6x^2\sqrt{x+4}dx$

$\lim_{x\to4}\left(\frac{\left(x-4\right)}{4\ln\left(x\right)-4\ln\left(4\right)}\right)$

$\left(10x^2-2y^2\right)^2$

$-\left(-75\right)+\left(-\left|75\right|\right)$

$2f-3\ge-11$

$\left(3x-1\right)\left(x+3\right)$