$92.53-2.539$
$4-14-2+15$
$\:\left(3x\right)^2\:x^{-7}$
$x^{16}-y^{16}$
$\left(5x^3\:-\:6y\right)^2$
$\left(1+\frac{3k}{n}\right)^2$
$\cos\:\left(x\right)\left(cos\left(x\right)+5\right)=2+sin^2\left(x\right)$
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