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48×(7/12+2)÷2/3
=48×(7/12+2)×3/2
=48×3/2×(7/12+2)
=72×(7/12+2)
=72×(7/12+24/12)
=72×7/12+72×24/12
=42+144
=186
=48×(7/12+2)×3/2
=48×3/2×(7/12+2)
=72×(7/12+2)
=72×(7/12+24/12)
=72×7/12+72×24/12
=42+144
=186
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