$-7x^2-2x+8-5x^2-6x-3$

$\int\left(12\log_{11}\left(x\right)\right)dx$

$2x-3>4x+17$

$k=\frac{-sen^2x}{2senx\:cosx}$

$-3x\le24$

$\frac{5\cos\left(x\right)}{1+\sin\left(x\right)}+\frac{5+5\sin\left(x\right)}{\cos\left(x\right)}$

$-\left|-3+4\right|+\left(-4-\left(-2\right)+18-5\right)$