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Lisp Mathematical Expression Evaluator
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=: Lisp is an expression-oriented programming language.

=: Lisp expressions are written with its elements separated by white
spaces and surrounded by parenthesis.

=: Four Arithmetic operators will be implemented to evaluate Math
Expressions (*, /, -, +)

=: Example: (+ 1 2) is Lisp expression that has 3 Atoms +, 1 and 2


Operations
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=: Addition operator (+)
(+ a b c …) will return the sum of all the operands a + b + c + d + …
(+) will return 0

=: Subtraction Operator (-)
(- a b c d …) will return the subtraction a – b – c – d - …
(-a) will return –a Minus operator must require 1 operand

=: Multiplication Operator (*)
(* a b c ..) will return the product of all elements a * b * c * …
(*) will return 1

=: Division Operator (/)
(/ a b c d …) will return the division of all operands a / b / c / d / ….
(/ a) will return 1/a as the division operator must require 1 operand


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