$$\frac{0\cdot89\times0.89\times0\cdot89-0\cdot64\times0\cdot64\times0\cdot64}{0\cdot89\times0\cdot89+0\cdot89\times0\cdot64+0\cdot64\times0\cdot64}$$
$\text{Indeterminate}$
$$\frac{0}{0}$$
$$-1$$
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