If A means '+', B means '×', C means '÷' and D means '-', then find the value of 17A12B20C5D12?

53 42 101 98

53

17A12B20C5D12 =17 +12 x 20/5 - 12 = 17 +12 x 4 - 12 = 17 + 48 -12 = 65 - 12 = 53