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Question
Multiply: `2/3"ab"` by `-1/4 "a"^2"b"`
Solution
`2/3"ab"xx-1/4"a"^2"b"=(2/3 xx(-1)/4)("ab"xx"a"^2"b")`
`=-1/6"a"^(1+2)."b"^(1+1)`
`=-1/6"a"^3"b"^2`
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