$\left(3x^2\:-\:2y^2\right)\:^4$

$\sin\left(360+x\right)=\sin\left(x\right)$

$63\:x\:\left(-6\right)-\:83\:+\:\left(-31\right)-\:\left(-42\right)$

$\frac{55x}{11^2}$

$2x\left(x+2\right)\left(x^2+x+1\right)$

$\frac{cos\:\left(4x\right)-cos\left(2x\right)}{sen\:\left(2x\right)-sen\:\left(4x\right)}$

$\frac{\cos\left(x\right)+\sin\left(x\right)\tan\left(x\right)}{1+\tan\left(x\right)^2}$