$2a-3b+c\:+-2a+4b-c$
$\frac{x^4+4x^3-4x^2-5}{-2}$
$\frac{1}{\cos^6}$
$-2+2-1$
$52-\left(-64\right)$
$\int4x^5\left(6x^6+3\right)^5dx$
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