calc calc_lst1 calc_lst1_itm1 instruction assignment assign_item id c assign_op = locigal_or locigal_and bitwise_or bitwise_and equality relational bitwise_shift sum mult power factor number 2 mult_lst1 mult_lst1_itm1 mult_item mult_op * power factor number 4 sum_lst1 sum_lst1_itm1 sum_item add_op plus + mult power factor number 2 ;