$\frac{2\csc\left(-x\right)}{\sec\left(-x\right)}=-2\cot\left(x\right)$
$-4x-1x-8$
$5\left(x^2-16x+64\right)$
$\frac{1}{-2}\cdot4$
$\int5^sds$
$\left(x+2a\right)\left(x-4a\right)$
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