$\tan^240$
$27x^6-64y^{12}$
$38.5-25.2+\left(15.5\right)-10.5$
$\left(4+3c^5\:5\right)$
$\tan^2\left(x\right)\cdot\cot\left(x\right)\cdot\sin\left(2x\right)$
$0.9^2+8\left(6.4-3.28\right)$
$\frac{3a^{-5}b^2c^{-2}}{a^{-1}b^{-4}c}$
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