$\left(cscx-1\right)\left(cscx+1\right)=csc^2x-1$
$-32+36-76+23-12-21$
$\lim_{x\to\infty}\left(n^22^{-n}\right)$
$2z+4^2$
$\int\frac{2x^2}{x^3+x^2+x+1}dx$
$3y=3x^{4x^2}$
$\sqrt[2]{m^7}$
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