1, the result is equal to 1: 3-7+5 = 1.

2. The result is equal to 2: (3+7) ÷ 5 = 2.

3, the result is 3: 3! ÷(7-5)=6÷2=3。

4. The result is equal to 4: (7+5) ÷ 3 = 4.

5. The result is 5: 3+7-5 = 5.

6. The result is equal to 6: 3× (7-5) = 6.

7. The result is 7: 7! ÷5! ÷3! =5040÷ 120÷6=7。

8. The result is 8: 3× 5-7 = 8.

9. The result is 9: 7+5-3 = 9.

10, the result is equal to 10: 3! +(7-5)? =6+4= 10。

Among them, such as 3! The factorial of 3, 3! =3×2× 1=6。

With "m! ! "Express delivery.

When m is a natural number, it means the product of all positive integers not exceeding m and having the same parity with m, such as:

When m is a negative odd number, it means the reciprocal of the absolute product of all negative odd numbers whose absolute values are less than their absolute values.

When m is a negative even number, m! ! Does not exist.

N factorial representation of any natural number greater than or equal to 1;