$8cot^2x+12cot\:x-8$
$3-5^2+5\left(-5-4\right)$
$\int\frac{2x+1}{\left(x-1\right)\left(x-2\right)\left(x-3\right)}dx$
$\log2=5$
$100a^2+100a+25$
$-4x^3+x^3+x^3-6y^3+y^3+4y^3-3$
$40\cdot44$
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