$a^2-ab\:entre\:\:-3x^2$

$1-2x<5$

$27x^3+125y^3$

$\frac{\sin^3\left(x\right)+\sin\left(x\right)\cos^2\left(x\right)}{\cos\left(x\right)}=\tan\left(x\right)$

$\sin\left(x\right)=2\sin\left(x\right)^2$

$\left(x-1\right)^2+5\ge\left(x-3\right)^2$

$\left(-5\right)-\left(-2\right)\cdot\left(-3\right)$