$64a^2+160ab+100b^2$
$3x+5y-2x+7y-2\:+10$
$x^3+2x^2+x-4$
$3.x+50=5.x$
$\int\left(x-e^{-2x}\right)^2dx$
$24m^2n^4+36mn^3+48m^2n^2$
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