The result is 1 1:
3? +7-5?
= 9+7-5?
= 1 1
The result is 12:
3! ×(7 -5)
=3×2× 1×(7 -5)
=3×2× 1×2
= 12
The result is 13:
[√(-3+7)]? + 5
= [√4)]? + 5
=2? +5
=8+5
= 13
The result is 14:
3! +7+5?
=3×2× 1+7+ 1
=6+7+ 1
= 14
The result is 15:
3+7+5
= 15
The result is 16:
3×7-5?
=2 1-5
= 16
The result is 17:
-3? -7+5?
=- 1-7+25
= 17
The result is 18:
3! +7+5?
=3×2× 1+7+5
=6+7+5
= 18
The result is 19:
(-3+7)! -5?
=4×3×2× 1-5
=24-5
= 19
The result is 20:
(-3+7)×5?
=4×5
=20