Answer Posted / triveni

Parenthises are never needed in prefix or postfix
expression because ---it is a carried according to the
BODMAS( it is a mathmatical operation order short rule to
solve brackets) rule by removing brackets. In case of
postfix or prefix expression, they are actually conversions
of the orginal standard equation, where the brackets have
already been taken into consideration, expression is the
correct order of expansion of a given mathematical
statement..

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