Easy
Which expression is equivalent to 4−2⋅7−24^{-2} \cdot 7^{-2}4−2⋅7−2 ?
1282\frac{1}{28^{2}}2821
(7.4)2(7.4)^{2}(7.4)2
(7.4)−4(7.4)^{-4}(7.4)−4
7−242\frac{7^{-2}}{4^{2}}427−2
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