$\left(5-3+2\right)+\left(10-5-3+1\right)$
$sec^5\:x=\left(1+2\:tan^2\:\:x+tan^4\:x\right)sec\:x$
$6x-mx=2+m$
$\left(2a-6c\right)\left(2a+6\right)$
$\frac{3}{-2}x-4=20$
$\left(-5\right)x\left(-5\right)^6$
$267+-520$
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