Commands
M-x
	ielm
		elisp REPL
		C-c C-b
			change ielm working buffer
		M-p
			previous input
		M-n
			next-input

	lisp-interaction-mode
		put the current buffer to the lisp interaction mode


C-x m
	Start eshell


Evaluate e-lisp
C-j
	Eval the expression and print results right into the buffer (for *scratch*)
M-:
M-ESC :
	Evaluate expression just from the mini-buffer (eval-expression) 
C-c v
	Evaluate the current buffer (eval-buffer)
C-x C-e
	Evaluate last sexp (eval-last-sexp)
C-M-x
	Evaluate top-level form, containing point or after point (eval-defun)