# Remove the obvious common factor?

**URL:** <https://community.wolfram.com/t/remove-the-obvious-common-factor/16090>\
**Category:** Questions\
**Created:** [May 27, 2020, 5:52pm UTC](https://community.wolfram.com/t/remove-the-obvious-common-factor/16090 "2020-05-27T17:52:09Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![xiang33](https://avatars.discourse-cdn.com/v4/letter/x/b5a626/32.png) [@xiang33](https://community.wolfram.com/u/xiang33)\
**Post date:** [May 27, 2020, 5:52pm UTC](https://community.wolfram.com/t/remove-the-obvious-common-factor/16090/1 "2020-05-27T17:52:09Z")

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[Open in Wolfram Cloud ↗](https://www.wolframcloud.com/obj/e2f399f7-efef-4931-9a3e-b4a6b660078e)

Why the Mathematica cannot simplify (L2^{-s})^{-1/s} to L2 ?

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**Author:** ![danl](https://yyz1.discourse-cdn.com/wolfram/user_avatar/community.wolfram.com/danl/32/41267_2.png) [@danl](https://community.wolfram.com/u/danl)\
**Post date:** [May 27, 2020, 6:13pm UTC](https://community.wolfram.com/t/remove-the-obvious-common-factor/16090/2 "2020-05-27T18:13:05Z")

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This is essentially the same issue as discussed here.

> [@Mathematica does not simplify Sqrt\[x^2\] in expressions?](https://wolfram.discourse.group/t/13987/1):
>
> Mathematica does not simplify Sqrt[x^2] in expressions. Even if attempting: Simplify[Sqrt[x^2]] or FullSimplify[Sqrt[x^2]] The result remains: Sqrt[x^2] instead of just x. Am I missing something? Do I need to specify a condition like x belongs to R for it to work?

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**Author:** ![xiang33](https://avatars.discourse-cdn.com/v4/letter/x/b5a626/32.png) [@xiang33](https://community.wolfram.com/u/xiang33)\
**Post date:** [May 27, 2020, 9:09pm UTC](https://community.wolfram.com/t/remove-the-obvious-common-factor/16090/3 "2020-05-27T21:09:23Z")

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Thanks.