$25m^2+130mn+169n^2$
$7x^3+6x^2y^2$
$4\int\left(\sin\left(x\right)^3\right)dx$
$5c-2c+c$
$3m+2d+m+2d-m$
$3\sin x-1=2\sin x$
$781+334$
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