soheil1 That's all there is to algebraic notation. "That" is a reference to text that occurred earlier, in which, we can only suppose, algebraic notation is explained. It summarizes the previous explanation by saying that there is no more to be explained.
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soheil1That's all there is to algebraic notation."That" is a reference to text that occurred earlier, in which, we can only suppose, algebraic notation is explained.