m(1-m2)+3n(1-m2)=(m+3n)(1-m)(1+m)
2a(a3-1)+b(a3-1)=(2a+b)(a-1)(a2+a+1)
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m(1-m2)+3n(1-m2)=(m+3n)(1-m)(1+m)
2a(a3-1)+b(a3-1)=(2a+b)(a-1)(a2+a+1)