$-11+1+-15$
$\int\frac{x^2+1}{x^3+3x^2+3x+1}dx$
$\left(1-3ax\right)\left(3ax\:+\:1\right)\:=\:1\:-\:9a^2x^2$
$9a^2-12ab+4b^2$
$12x-4=12x+3$
$\int\left(8x^4\left(x^5-7\right)^6\right)dx$
$400x^{14}-441y^{18}$
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