True or false (numbered z) where z is (2 x sausage) False, because sausage is not a number. [Pg.98]

What is numbered It is a function that determines whether a representation of an arithmetic expression contains only numbers besides the +, x, and t. [Pg.98]

And you must know the fourth one. (eq (ear (edr aexp)) (quote T)), of course. [Pg.99]

Should we tisk another question about aexp No So we could replace the previous question by else. [Pg.99]

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