$\frac{dt}{dx}=-\frac{2x\cdot cos^3\left(t\right)}{sin\left(t\right)}$
$6y+5=6y-5$
$54x+64>49x+59$
$2x-4y+6$
$\left(5m-5\right)\left(5m+8\right)$
$5x^3\cdot\:2x^4$
$-495-\left(-430\right)$
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