Fine, if you can "paint" the full equation on your calculator. But on simpler calculators people may have a hard time getting it right. 3 + 4 = / ( 5 + 6 = +

Fine, if you can "paint" the full equation on your calculator. But on simpler calculators people may have a hard time getting it right. 3 + 4 = / ( 5 + 6 = + ( 7 + 8 ) / ( 9 + 2 =