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#### 7.2.49 eval

`(eval EXPR)`
  Evaluate a lisp expression. If EXPR is an unevaluated S-expression as returned by the `(quote ...)` command then the effect will be as if calling the un-quoted expression directly. It is also possible to evaluate S-expression constructed via `car`, `cdr` and `cons`. See `(car ...)`. See `(cdr ...)`. See `(cons ...)`.