$\sin^2\left(x\right)-\sqrt{3}\sin\left(x\right)=0$

$\left(1+cos\left(x\right)\right)\left(1-cot\left(x\right)sin\left(x\right)\right)$

$\lim_{x\to0}\left(\frac{\left(15^x-5^x-3^x+1\right)}{xsinx}\right)$

$\left(6x^2-\:2x^7\right)\:\left(6x^2\:+\:2x^7\right)$

$\left(-29\right)-\left(-33\right)$

$-\left|13+\left(-4\right)\right|-\left(-12\right)-2+4-\left(-1\right)$

$\left(\frac{1}{5}z-\left(10\right)\:z^3\right)^2$