lisp - Scheme and let errors -

I can not figure out for my life why this code error causes error: here

Command: Bad syntax (missing body): (Walk * ((Temp2 (P2) (Latic ((Molep (P1 p2) (if (= (length P1) (and ( If ((= (length P2) 0) ((set! P2) (multiloop (cdr p1) (p2)) and (let * ((prod (append (prod) (expon P2)))))))))) (Set! P2 (CDR P2)) () () (MOOPAP (P1P2)) (Simplified (sorted by new way Here is the code:

  (multiplyPoly (lambda (p1p2) ((let's * ((Set (= (length = P2) 0 ((set (!) ((Set 2!) ((Hardness 2 (p2) (latex (((p1p2) (if (= (length p1) P2 (HardP2)) (Multipurpose (CDR P1) (P2)) (and (let * ([Prod (append) (Opposition (* (COF (Car P1)) (Cuf (Car) P2) () (Exxon (Car P1)) (Exxon (Car P2))))))) (Set! P2 (CDR P2)) (Empletion (P1P2)) (Simplified (new type))))))))))))))  

< P> your Code are many syntax errors I like you have the urge to install an IDE that recognizes your code matches the brackets and precisely. Dr Recket supports both R5RS and R6RS so that you can still program with DrRacket in the plan.

Typically one let , let * and letrec have the following form:

 < Code> (but different expressions) ... body  

a letrec or letrec * expression (lambda ( Arg ...) looks like .

If you take an expression of any scheme like (if (positive? X) - +) and surround them with an extra pair of brackets, then you can get the result to processed Are calling as: Code> ((if (positive? -1) - +)); ==> 0

A if works in such a way:

  (if ingenious-expression result-expression alternative-expression)  

If you need nest then you need to be nested, because as an alternative expression.

  (If the ingenious-expression result-expression (if the expression-expression 2 result-expression-2 option-expression))  

Better matches should be written in the above expression

  (cond (expression-expression result-expression) (ingenious-expression2 result-expression) (other alternative expression))  

< Code> Other has special meaning in cond , so it's not something that works on itself is.