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hey everybody my name is Chris and Im a tutor here at check comm and I mostly do math and computer science and in this video were going to talk about polish notation so published notation is sometimes also called prefix notation and its basically another way of writing arithmetic expressions like three plus five this is the way that were all really used to writing this and this is sometimes called infix notation in fix because the operator here is in between the operands three and five so polish notation or prefix notation would be plus three five so it seems pretty kind of strange at first but whats nice about this is this sort of notation is set up so that we dont really have to use parenthesis so for example if we were going to say three plus five times two because of order of operations these parentheses here are very necessary but with the Polish or the prefix notation we could write this as x + 3 5 - and the way we would do this is we would read this from right to left so
