how to get 61 using only the numbers 1,9,8,9?

Question

the 1989 must be arranged accordingly to what is given in the formula to get 61

Answer 1

-1 ·(9/√9) +8²

 

= -1·(9/3) + 64

 

= -3 + 64

 

= 61

 

or if they have to be in the order 1,9,8,9

 

maybe

 

-1·{(√9)!} + 8² +√9

Answer 2

[(√9)!/.1]+9-8

[3!/.1]+9-8

[(3*2*1)/.1]+9-8

[6/.1]+9-8

[60/1]+9-8

60+9-8

69-8

61