Implement A Syntactic Transformation Let Gt Combination That Reduces Evaluating Let 661585
Let expressions are derived expressions, because
(let ((<var 1><exp 1>) … (<var n><exp n>))
<body>)
is equivalent to
((lambda (<var 1> … <var n>)
<body>)
<exp 1>
<exp n>)
Implement a syntactic transformation let->combination that reduces evaluating let expressionsto evaluating combinations of the type shown above, and add the appropriate clause to eval to handlelet expressions.