expression = '(4 + 2) * 3'
expression/expression[0] = '(4 + 2)'
expression/expression[0]/SYMBOL_LB = '('
expression/expression[0]/expression = '4 + 2'
expression/expression[0]/expression/expression[0] = '4'
expression/expression[0]/expression/expression[0]/number = '4'
expression/expression[0]/expression/expression[0]/number/numberInt = '4'
expression/expression[0]/expression/expression[0]/number/numberInt/NUMBER_INT = '4'
expression/expression[0]/expression/operator3 = '+'
expression/expression[0]/expression/operator3/operatorAdd = '+'
expression/expression[0]/expression/operator3/operatorAdd/SYMBOL_ADD = '+'
expression/expression[0]/expression/expression[1] = '2'
expression/expression[0]/expression/expression[1]/number = '2'
expression/expression[0]/expression/expression[1]/number/numberInt = '2'
expression/expression[0]/expression/expression[1]/number/numberInt/NUMBER_INT = '2'
expression/expression[0]/SYMBOL_RB = ')'
expression/operator2 = '*'
expression/operator2/operatorMul = '*'
expression/operator2/operatorMul/SYMBOL_MUL = '*'
expression/expression[1] = '3'
expression/expression[1]/number = '3'
expression/expression[1]/number/numberInt = '3'
expression/expression[1]/number/numberInt/NUMBER_INT = '3'
