$5-3b+b+10$
$\frac{\sec\left(x\right)\tan\left(x\right)}{-\csc\left(x\right)\cot\left(x\right)}$
$\left(x+10\right)\left(x+5\right)$
$a+\frac{c}{d\:}-n$
$3-4y+-7y+8.4$
$\lim_{x\to2}\left(x+1\right)\left(x-5\right)$
$2-\left(-8\right)-\left(-3\right)$
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