$4d-48$
$\cos\left(2x\right)=\sqrt{5}$
$x2+5x-84$
$1.\left(2a+b\:\right)^2$
$\lim_{x\to\infty}\left(\frac{10}{x}\right)^{5x}$
$14f^3+42f^5-77f^7$
$\left(-x^4\right)^{-3}$
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