a = 4 + (14 * (6 + 12 + 2 * 16) + 9) * (  11*(3+21) + 15*8*13  ) * 19 +   5 * 18   + (1+10*(17 + 7)) + 20
b = 3.14 * 29.3 / 1.23E-5 - (123456 % 789)
c = (a * b) - (a/b - d)