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Find the domain of the function $g$ where $g\!\left(x\right)=2x-7$ .

The domain is (in interval notation).

If you need to enter $\infty$ , you can type inf or infinity. If you need to union two (or more) intervals, use the letter U. For example, to enter $(\infty,5)\cup(5,10]$ you can type (-inf,5) U (5,10].