$\frac{\left(cot\left(30\right)-tan\left(30\right)\right)}{\left(csc\left(120\right)+cot\left(120\right)\right)}$

$\sin\left(x\right)\frac{13}{21}$

$113\:-\:206$

$\frac{\tgx^{n+3}y^{m-1}}{x^{1+1}y^{n}}$

$-8w-5<-2w+4$

$\frac{\left(x^3y^2\right)^{\frac{1}{6}}}{\left(x^{-5}y^{-1}\right)^{-\frac{1}{3}}}$

$\int\frac{\sqrt{-x^2+16}}{16}dx$