Atoms and Operators

• Integer numbers
  3, 27, -88
  
  
• Floating point numbers
  2.34, -0.9, 123.333
  
  
• Symbols
  X, name, My_Name
  
  
• Arithmetic operations
  +, -, *, /
  
  
• Variables, assignment operation
  (setq symbol value)
  
  
• Lists, list operations
  (2 name -3.56), ()
  (car a_list), (cdr a_list)
  
  
• nil, `()