$\frac{-10-\sqrt{196}}{-\frac{2}{10}}$
$\int_7^{4x^3}\left(4t-4\right)dt$
$-5x.\left(4x^3+3x^4\right)+\left(-14x^7\right):\left(7x^2\right)$
$\frac{d}{dx}2x\left(\left(\ln\left(x\right)\right)-1\right)+7e^3$
$\left(k^2-5k-2\right)\left(k^2+2\right)$
$\tan^2\left(a\right)\cdot\csc^2\left(a\right)-\cos^2\left(2\pi\right)$
$\frac{1-\:sen^2a}{cot\:a}$
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