$7g+-3-2g+4^2$
$\int\frac{x^6}{\left(x^7+4\right)^7}dx$
$\left(3a-2x\right)^2$
$+126+452$
$a^2-31a-630$
$-3\left(-2^2\right)$
$\left(b^5+15\right)\left(b^5+4\right)$
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