$a_n=3n-2$
$\left(x-3\right)^2-10\left(x-3\right)+25$
$\int\frac{\left(2x-3\right)}{\sqrt{x^2+4}}dx$
$-107+25$
$-\left(x-6y\right)$
$256n^2+225m^2+480mn$
$\left(-8\right)\left(9\right)\left(-7\right)\left(4\right)\left(-5\right)$
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