$70+\left\{\left[18-\left(16-11\right)+4\left(15-12\right)\right]\left[\left(6+4\right)-\left(4\right)\left(2\right)\right]\right\}$
$\left(a^3-5b^2\right)^3$
$\left(6n^{-1}\right)^3$
$\left(csc\left(x\right)\right)\left(csc\left(x\right)+cot\left(x\right)\right)$
$\frac{x^{20}}{\left(x+4\right)^2}$
$\int dk$
$f\left(x\right)=-2e^{\left(-x\left(2\right)+1\right)}$
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