(adsbygoogle = window.adsbygoogle || []).push({}); What does it mean to be "simple"

1. The problem statement, all variables and given/known data

I never understood what it meant to be "simple"

For example in the ones below which one is more "simple" I was asked to simplify and didn't know were to stop as I am confused as to what it means to be "simple" as it's always defined very loosely and broadly, if somebody could give me a solid definition that I can apply to any problem when asked to "simplify" that would be great... like saying perform all the operations you can is wrong right? Because you could just completely expand everything and setting real numbers to imaginary numbers so that way there all in the same base ect.... I'm just really confused what it means to be "simple"

-(14x + 21)/(x^2 + 3x) or -7/x - 7/(x+3)

(x^2 - 1)/(x^2 SQRT(x^2 + 3) + 2x^2) or 1/( SQRT(x^2 + 3) + 2 ) - 1//( x^2 SQRT(x^2 + 3) + 2x^2 )

2. Relevant equations

3. The attempt at a solution

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# Homework Help: What does it mean to be simple

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