$a-a-b+a^2+5b$
$100s^2-140st+49t^2$
$\int\left(\left(\frac{3u}{34}+\frac{v}{17}\right)^2+\left(\frac{u}{68}+\frac{3v}{17}\right)\right)dx$
$log3\left(x+3\right)+log3\left(x-3\right)=3$
$16a^2-24a^2+6a-1$
$6z^2-7z+3$
$121x^2-4y^8$
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