"One main reason why the separate nature of the science of operations has been little felt, and in general little dwelt on, is the shifting meaning of many of the symbols used in mathematical notation. First, the symbols of operation are frequently also the symbols of the results of operations."

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My mom had a job, and she also took care of us, and she also took care of Dad - I always saw her pulling triple duty, doing more than I ever felt like she needed to. I made a promise to myself that it would be more of a team effort in my family someday. And because of that, I became more independent.

— Carrie Underwood