$2+cosec4x=0$

$\int_0^{\frac{\pi}{4}}\arcsin^2\left(x\right)dx$

$\frac{1000}{-8.9}$

$\frac{\left(1+t^2\right)^{\frac{5}{2}}}{\left(1+t^2\right)}$

$\frac{\left(3^2\right)^5\cdot3^3}{\left(3^3\right)^2}$

$\lim_{x\to\frac{\pi}{4}}\left(\frac{\sin\left(2x\right)-1}{4x-\pi}\right)$

$\frac{x^{-2}y^{-3}-x^{-3}y^{-2}}{x^{-3}-y^{-3}}$