$\int\frac{e^{7x}}{4+e^{7x}}dx$
$27x^2+57x+30$
$\left(3m^2-6y\right)^2$
$\left(-40\right)\:x\:\left(+74\right)$
$-5m+8n+3-m-n-2m-10$
$\left(7j+4w-5y\right)^2$
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