$\cos\left(2x\right)+4\cos\left(x\right)+3=0$

$10-2\left(4+3x\right)$

$8x^6-125n^6$

$\frac{d^3}{dx^3}\:\left(\:\:x^2\:senx\right)$

$\int\left(x\left(x+1\right)^4\right)dx$

$\frac{\cos\left(v\right)^2}{\sin\left(v\right)^2}-\cos\left(v\right)^2$

$\left(4\:-\:8\right)\::\:\left(-\:2\right)\:-\:\left(-27\right)\:+\:\left(-15\right)\:.\:3$