+ =
3.9× =
9÷ =
6﹣ =
× =
2+ =
﹣ =
3÷1%=
1﹣ ÷ ﹣ =
3+ × ÷ =
÷( ﹣ )× =
× + ÷ =
78×150%﹣78× =
×[1÷( + )]=