$11b+9b$
$\left(-3\right)\left(-2\right)\left(1\right)\left(-2\right)\left(-2\right)\left(-1\right)$
$+2-+80$
$\left(-5x-2\right)\left(4x-1\right)$
$cot^210$
$\left(x^4-16\right)^2$
$2\sec^3\left(x\right)-2\sec^2\left(x\right)-2\sec2$
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