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Mathematics
Problem
Write without brackets or negative exponents: (a)
x
−
2
×
x
−
3
x^{-2} \times x^{-3}
x
−
2
×
x
−
3
(b)
2
(
a
b
)
−
2
2(ab)^{-2}
2
(
ab
)
−
2
(c)
2
a
b
−
2
2ab^{-2}
2
a
b
−
2
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