$\left(3x-6\right)\left(2x-1\right)$
$\int x^{-69}dx$
$135=9n$
$\left(11a\:+\:5b\right)\left(11a\:-\:5b\right)$
$\csc^2x+1=-\cot^2x$
$x^2+32x-8=0$
$y'=y+2e^{\left(-x\right)}$
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