$\frac{64-y^6}{2+y}$
$-\frac{180}{-6}$
$-15x-6$
$-9cos^2\left(x\right)+9=16sinx-7$
$\frac{\left(cos\:x+cot\:x\cdot sin\:x\right)}{2\:tan\left(\frac{\pi}{2}-x\right)}$
$\left(1\right)^2+7\left(1\right)-8$
$49b^2-21b-10$
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