Comments by "Beer_Dad" (@Beer_Dad1975) on "Reverse Polish Notation and The Stack - Computerphile" video.

  1. You don't need brackets as you control precedence by order of the operands and operators For example 4;5;6;+;x might be (5+6)x4, whilst 4;5;+;6;x would be (4+5)x6.  Hope you can follow my notation - had to use x as a multiplier as asterisk seems to cause bold type. The system I work with uses semi-colons to indicate a push and then calculates left to right pushing the the result from the last operator back onto the stack.
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