The greatest common factor of the expression is 4m⁴.
What is GCF?
GCF simply means the greatest common factor.
The greatest common factor (GCF) of a set of numbers is the largest factor that all the numbers share.
Hence,
56m⁵
68m⁴
The greatest common factor of the expression is the largest positive expression that divides evenly into all numbers with zero .
Hence, the greatest common factor is 4m⁴
learn more on GCF here: https://brainly.com/question/11444998
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