Simplify and express the result in power notation with positive power.
a. (3-7 / 3-10) x 3-5
b. 2-3 x (-7)-3
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a. (-4)x(-2)/(-7)
=(8)/(-8+1)
=(2)^3/(1-(2)^3)
b. (-1)x(-7) -3
= 7-3
=4
=2^2
=(8)/(-8+1)
=(2)^3/(1-(2)^3)
b. (-1)x(-7) -3
= 7-3
=4
=2^2
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