How to calculate 1-100 by using 1,9,9,3 this four numbers?

9 × 9 + 32 - 1 = 89
92 + 9 + 1 - 3 = 88
92 - 9 + 1 - 3 = 70
(9 + 9) × (3 + 1) = 72
(9 + 1)2 - 92/3 = 73
(9 - 1)2 - 9/3 = 61
(9 - 1)2 + 9/32 = 65

2008-02-13 11:36:35 補充：
3^3 - 9 十 √9 - 1 = 47

2008-02-13 11:39:29 補充：
9^2 - 1 × (3^3)/9 = 729^2 - 1 - (3^3)/9 = 71

2008-02-13 11:51:03 補充：
Sorry for the previous mistake in 47, it should be:arctan (1) 十 3 - 9/9 = 47since arctan (1) = 45

39+9-1 = 47
(9+9)x(3+1) = 72

39+9-1 = 47
(9+9)x(3+1) = 72

這樣可不可呢?