1370 , x , 1070 , - 180 , - 6430
1370 - 50 * ( 5 ^ 0 ) = 1320 1320 - 50 * ( 5 ^ 1 ) = 1070 1070 - 50 * ( 5 ^ 2 ) = - 180 - 180 - 50 * ( 5 ^ 3 ) = - 6430 answer : a .
add(add(multiply(const_10, const_2), subtract(1370, 180)), const_100)