Introduction - If you have any usage issues, please Google them yourself
Enter any four integer (0-10), only addition and subtraction multiplication and division operators, as well as brackets. Each number only once and must be used. Requirements of these expressions to determine whether the results have 24. If so, the output computational expressions: such as the importation of 4,6,1,1 output 4* 6* 1* 1 = 24 (permit has brackets).