5+68empty space, 5, plus, 68 =(3+=(3+equals, left parenthesis, 3, plus 5 )+ 68)+68right parenthesis, plus, 68 =3 + (=3+(equals, 3, plus, left parenthesis +68)+68)plus, 68, right parenthesis =3 +=3+equals, 3, plus 70 ==equals 73