Find common factors in two expressions

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John Miller
John Miller 2020-4-22
评论： Ameer Hamza 2020-6-5
Is there some function so I can find a common factor in multiple expressions?
For example: syms x y
a= 5*(x^4/y)
b= 27*(x^4/y)
=> x^4/y is a common factor.
The reason I'm asking this is that I have some very long expressions I need to sum up. In order to shorten some stuff I would like to extract common factors and assign them to some variable. Thankful for any help!

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Ameer Hamza
Ameer Hamza 2020-4-22
编辑：Ameer Hamza 2020-4-22
syms x y
a = 5*(x^4/y);
b = 27*(x^4/y);
common_factor = gcd(a,b);
Result:
>> common_factor
common_factor =
x^4/y

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