23/132除以69/144-4/154除以21/126

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23/132除以69/144-4/154除以21/12623/132除以69/144-4/154除以21/12623/132除以69/144-4/154除以21/12623/132÷69/144-4/

23/132除以69/144-4/154除以21/126
23/132除以69/144-4/154除以21/126

23/132除以69/144-4/154除以21/126
23/132÷69/144-4/154÷21/126
=4/11-12/77
=16/77