$3x^2+66x-51=-87$
$-\left(-4^2\right)$
$x+12=9$
$35m^5-49m^3-7m$
$2bc-2b+3c;\:b=12;\:c=2$
$\int cos\:lnxdx$
$\frac{x}{5}+\frac{x}{2}+\frac{x}{4}<19$
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