$-7\:.\:-31.\:9$
$\left(-14\right)\left(47\right)$
$\left(-x^4+\frac{1}{2}x^2+x-\frac{7}{2}\right)-\left(4x^3-2x^2-5\right)$
$\int x^2\sin\left(7x\right)dx$
$cot\left(2x\right)=1.376$
$log\left(\frac{x^3}{y}\right)^2$
$\frac{\left(x^2+5\right)^5}{\left(x^3+6\right)^2}$
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