- Program 
  - MethodDecl name=main type=void params={}
    - Block 
      - VarDecl name=a type=int
      - VarDecl name=b type=int
      - VarDecl name=c type=int
      - VarDecl name=d type=int
      - Assignment loc=a expr=1
      - Assignment loc=b expr=(-a)
      - Assignment loc=c expr=(a+b)
      - Assignment loc=d expr=((a+b)+c)
      - Assignment loc=d expr=((a*b)+c)
      - Assignment loc=d expr=(a+(b*c))
      - Assignment loc=d expr=((a+b)*c)