$3\left(x-7\right)=12$
$4^2+4^{-2}$
$3\left(4\right)\:-\:2\left(-3\right)\:+\:4\left(4\right)\:+\:3\left(-3\right)$
$68\cdot84$
$f\left(x\right)=4\sec\left(x\right)-2\sec\left(5x\right)$
$6\left(-6\right)\left(-6\right)\left(-6\right)$
$3x^4-27x^2+2x^2m-18m$
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