$\int\frac{3}{x^2-81}dx$
$103^2-97^2$
$\frac{3x^2+22x+32}{x+5}$
$-3\cdot x=18$
$x^2-2x+8$
$\frac{8}{27}a^6+\frac{1}{64}b^3$
$b^2-3b-28$
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