Logo lets you leave out parentheses most of the time, except to use rest arguments or force grouping. For example:

    ? print list sum 0 1 2
    1 2

That expression parses as (print (list (sum 0 1) 2)) because both list and sum normally take 2 arguments. However, using the parenthesised function call syntax, you can pass them however many you like:

    ? (print (list 1 2 3 (sum 1 1 1 1)))
    1 2 3 4

Or you can of course mix and match (probably to better effect than this example):

    ? print (list 1 2 sum 1 2 4)
    1 2 3 4

Logo also lets you use infix arithmetic operators with normal precedence:

    ? print 1 + 2 * 3 + 4
    11