$\frac{1}{81}x^2-4>0$
$\int_1^{\infty}-\frac{1}{x^2}dx$
$5.0\:\cos\left(40\right)$
$\int xe^{-3e}dx$
$x^2+y^2=n^2$
$-19>w-8$
$x^4+4x^2+10$
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