$\int_1^23\left(x^2-1\right)dx$
$x^2+9x-2$
$4m^2-100n^2$
$2\:x^2\:-11\:x\:+14\:=\:0$
$4m^2+12m+26$
$27a^5b-3b^3-36y^2z^2-3a^2b$
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