$6+b-4-2b^2-4b^2+4b$
$2m+m+4n^2+4m-7n^2$
$x^2-8x+17$
$q^2-36$
$1m^2-5m-6$
$3y-7<-14$
$\int\frac{9}{x\sqrt{16-9x^2}}dx$
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