$+4\:-\:\left(-6\right)$
$\left(\frac{1}{\cos\left(b\right)}\right)-1$
$-y-4x-6z+2x+7y-12z$
$-\:5\:-\:\left(6\:+\:\left[-4\:+\:9\right]\:-\:8\right)$
$\left(m-4n\right)\left(3n-7m\right)$
$4=\left(\sec\left(x\right)\right)^2-2\tan\left(x\right)$
$\frac{6x^2+52x-71}{x+10}$
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