$20x^2+50x-70$
$3x^3-9xy+3^2y^2-3x^2y$
$x^2+8x=17$
$4c+5c$
$\int\frac{u^{2}-5u+9}{u^{2}-5u+6}dx$
$-4\:-1+\:8\:-13\:\:-1\:$
$512g^3-y^6$
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