$-7+4^2$
$\frac{\sin\left(-x\right)}{\tan\left(-x\right)}$
$x+7>12$
$504.34+.3$
$\frac{7^9-7.7^7}{7.7^5.7}$
$-10\:-\:\left(6\:-\:16\right)\:-\:2$
$5\log_{x}2$
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