$\frac{d}{dx}\left(4x^{-x}\right)$
$\left(-63\right)-\left(-27\right)-79$
$\left(a^x+b^{x+1}\right)^2$
$\left(10y^3+7\right)^2$
$x^2+12x+18=0$
$\left(l\cdot sin\left(q\right)+t\cdot sin\left(q+k\right)\right)^2+\left(l\cdot\:cos\left(q\right)+t\cdot\:cos\left(q+k\right)\right)^2$
$2\arctan\left(e^{\infty}\right)-2\arctan\left(e\right)$
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