$\int\frac{x-3}{x^2-2x-15}dx$
$\int\frac{\left(6\right)}{x^2-8x+4}dx$
$\int\:\frac{\left(log\:t\right)^2}{t}dt$
$\int18+\frac{1}{3}k\left(t^3-216\right)dt$
$\frac{a^2}{4}ab+b^2$
$2cos^22x=-3sin2x$
$y-5=3x^2+2x+7$
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