$\sin\left(5x\right)\sin\left(10x\right)-\cos\left(5x\right)\cos\left(10x\right)$
$sin\left(-x\right)cot^2\left(-x\right)+sin\left(-x\right)$
$3x^2+2\left(3\right)+\left(3\right)^2$
$\log_bm-\log_bu$
$4-2x-3$
$-6s+2s$
$-5\cdot32$
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