$b^2\:4b+4$
$\left(-1\right)^2\cdot\left(-1\right)^7$
$\frac{x^3}{12x}$
$\left(4-\frac{1}{3}x\right)^4$
$\sin\left(x\right)=-.14$
$y=4x^{-\frac{4}{7}}$
$\lim_{x\to1}\left(\frac{1-2x+x^2}{1+\log\left(x\right)-x^2}\right)$
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