How to calculate the four numbers 1, - 1,2,9, the result is 24

How to calculate the four numbers 1, - 1,2,9, the result is 24


Can I change the order?
(1+2)(-1+9)



2,5,5,10 how to calculate 24


2*5!*5º/10=24
5!=5*4*3*2*1
5º=1
2*5!*5º/10=2*5*4*3*2*1*1/10=2*4*3=24



2.10.10.10 how can we get 24


Only add, subtract, multiply and divide, there is no answer



5,5,5,2,4 from these five numbers, 24 is calculated


(5-5/5)*(2+4)=24