# Is it possible to omit multiplication operator in polish/prefix notation?

In infix notation, (2/2(3+3)) means (2/(2*(3+3)). The multiplication sign is omitted.

In polish/prefix notation, is it possible to omit multiplication sign? For instance, is it acceptable to write ( * + 2 3 ( / 12 4)) as ( + 2 3 ( / 12 4))?

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