$4a^2+6ab+6ab+9b^2$
$1800\left(1.2\right)-x$
$2cos2\theta\:=\sqrt{3}$
$\left(5m^3\:+\:2n^4\right)\:\left(25m^6-12m^3n^4+4n^8\right)$
$(4r^2t-2y)^2$
$\:x^{2\:}+22x+242$
$4x^2+x=3$
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