$0\:=\:6x^2+6x-12$

$x^2-x-3=0$

$\left(x+4\right)\cdot\:\left(2y+6\right)dy+xy^2dx=0$

$\frac{2n\left(2n+1\right)}{\left(2n+2\right)\left(2n-1\right)}$

$2\cos^2\left(x\right)-\sin\left(x\right)$

$\int\left(x\cdot\cos\left(8x^2+3\right)\right)dx$

$6+\left(-2\right)-\left(-4\right)-\left(-5\right)-\left(-2\right)-\left(-3\right)+2-4$