The sign [√] means 'square root' i used it 'cause that's the only one that is similar and available to represent square root sign. So, g(x) is square root of x.
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(f+g)(x) is the same as f(x)+g(x)=x^2-2x+5+√x and (f-g)(x)=x^2-2x+5-√x.

(f*g)(x)=x^2√x-2x√x+5√x or x^(5/2)-2x^(3/2)+5√x.

(f/g)(x)=(x^2-2x+5)/√x=x^(3/2)-2√x+(5√x)/x (rational form).
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