addExpr =
	factor.left ADD term.right SEMI {: return new AddExpr(left, right); :}
	;

subExpr =
	factor.left SUB term.right SEMI {: return new SubExpr(left, right); :}
	;

mulExpr =
	term.left MUL factor.right SEMI {: return new MulExpr(left, right); :}
	;

divExpr =
	term.left DIV factor.right SEMI {: return new DivExpr(left, right); :}
	;

modExpr =
	term.left MOD term.right SEMI {: return new ModExpr(left, right); :}
	;

equalsExpr =
	term.left EQUALS term.right SEMI {: return new EqualsExpr(left, right); :}
	;

notEqualsExpr =
	term.left NOTEQUALS term.right SEMI {: return new NotEqualsExpr(left, right); :}
	;

lessEqualsExpr =
	term.left LE term.right SEMI {: return new LessEqualsExpr(left, right); :}
	;

greatEqualsExpr =
	term.left GE term.right SEMI {: return new GreatEqualsExpr(left, right); :}
	;

lessExpr =
	term.left LESS term.right SEMI {: return new LessExpr(left, right); :}
	;

greatExpr =
	term.left GREAT term.right SEMI {: return new GreatExpr(left, right); :}
	;