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(-4)^73:2^144-25^12:5^23= [(-2)^2]^72:2^144-[5^2]12:5^23= (-2)^144:2^144-5^24:5^23= -1-5^1=-1-5=-6
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(-4)^73:2^144-25^12:5^23= [(-2)^2]^72:2^144-[5^2]12:5^23= (-2)^144:2^144-5^24:5^23= -1-5^1=-1-5=-6