$2sinx+2=4\:$

$2x\:para\:x=-2$

$\frac{2.36}{2}$

$\left(-2\right)^9:\left(-2\right)^6$

$\left(-57\right)\cdot\left(-19\right)\cdot57$

$4\cdot x^2\cdot\frac{d^2y}{dx^2}+4\cdot x\cdot\frac{dy}{dx}+\left(2\cdot x^2-1\right)\cdot y=0$

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