$39-17,65$
$\left(9x-3y\right)^2$
$\sqrt{12h}^4$
$-5\cdot1-16$
$10+-20+80$
$\sqrt[18]{18^9}$
$\cot\left(e\right)+\sin\left(e\right)=\cos\left(e\right)$
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