=х³(х²-1)=х³(х-1)(х+1)
=5n(1-n²)=5n(1-n)(1+n)
=m³(16-m²)=m³(4-m)(4+m)
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=х³(х²-1)=х³(х-1)(х+1)
=5n(1-n²)=5n(1-n)(1+n)
=m³(16-m²)=m³(4-m)(4+m)