97 of 100 targets have a solution.
\(1 = 17 - 7 - 9 \)
\(2 = \frac{ 17 - \sqrt{9} }{ 7 }\)
\(3 = \sqrt{9}!! - 717 \)
\(4 = 7 \cdot \sqrt{9} - 17 \)
\(5 = 19 - 7 - 7 \)
\(6 = \frac{ 91 }{ 7 } - 7 \)
\(7 = 17 - 7 - \sqrt{9 }\)
\(8 = 79 - 71 \)
\(9 = 1 \cdot 7 - 7 + 9 \)
\(10 = ( 1^{7} )^{7} + 9 \)
\(11 = \frac{ 7 }{ 7 } + 1 + 9 \)
\(12 = \frac{ 91 - 7 }{ 7 }\)
\(13 = 17 - 7 + \sqrt{9 }\)
\(14 = 91 - 77 \)
\(15 = 17 + 7 - 9 \)
\(16 = 1^{7} \cdot 7 + 9 \)
\(17 = \sqrt{17^{9 - 7 }}\)
\(18 = 19 - \frac{ 7 }{ 7 }\)
\(19 = 17 - 7 + 9 \)
\(20 = \frac{ 7 }{ 7 } + 19 \)
\(21 = 17 + 7 - \sqrt{9 }\)
\(22 = 7 - 1 + 7 + 9 \)
\(23 = 1 \cdot 7 + 7 + 9 \)
\(24 = \sqrt{( 71 - 7 ) \cdot 9 }\)
\(25 = 7 \cdot \sqrt{9}! - 17 \)
\(26 = 97 - 71 \)
\(27 = 17 + 7 + \sqrt{9 }\)
\(28 = \sqrt{791 - 7 }\)
\(29 = 71 - 7 \cdot \sqrt{9 }!\)
\(30 = 7 \cdot 7 - 19 \)
\(31 = ( 1 + 7 ) \cdot \sqrt{9} + 7 \)
\(32 = ( 1 + 7 ) \cdot ( 7 - \sqrt{9 } )\)
\(33 = 17 + 7 + 9 \)
\(34 = ( 9 - 7 ) \cdot 17 \)
\(35 = ( 1 + 7 - \sqrt{9} ) \cdot 7 \)
\(36 = ( 7 - 1 )^{9 - 7 }\)
\(37 = \frac{ 9! }{ 7! + 7! } + 1 \)
\(38 = 7 \cdot \sqrt{9} + 17 \)
\(39 = 7 \cdot 7 - 1 - 9 \)
\(40 = 1 \cdot 7 \cdot 7 - 9 \)
\(41 = 7 \cdot 7 + 1 - 9 \)
\(42 = 91 - 7 \cdot 7 \)
\(43 = ( 7 + 7 ) \cdot \sqrt{9} + 1 \)
\(44 = 17 \cdot \sqrt{9} - 7 \)
\(45 = ( 1 + 7 + 7 ) \cdot \sqrt{9 }\)
\(46 = 7 \cdot 9 - 17 \)
\(47 = ( 1 + 7 ) \cdot 7 - 9 \)
\(48 = 7^{9 - 7} - 1 \)
\(49 = 7^{9 - 1 \cdot 7 }\)
\(50 = 71 - 7 \cdot \sqrt{9 }\)
\(51 = 771 - \sqrt{9 }!!\)
\(52 = 1 \cdot 7 \cdot 7 + \sqrt{9 }\)
\(53 = 77 - ( 1 + \sqrt{9 } )!\)
\(54 = ( 7 - 1^{7} ) \cdot 9 \)
\(55 = 71 - 7 - 9 \)
\(56 = ( 17 - 9 ) \cdot 7 \)
\(57 = 7 \cdot 7 - 1 + 9 \)
\(58 = 77 - 19 \)
\(59 = \frac{ 177 }{ \sqrt{9 } }\)
\(60 = \frac{ 7! }{ 91 - 7 }\)
\(61 = 71 - 7 - \sqrt{9 }\)
\(62 = 79 - 17 \)
\(63 = \frac{ 7! }{ 71 + 9 }\)
\(64 = 1^{7} + 7 \cdot 9 \)
\(65 = ( 1 + 7 ) \cdot 7 + 9 \)
\(66 = \frac{ 9! }{ 7! } + 1 - 7 \)
\(67 = 77 - 1 - 9 \)
\(68 = 7 \cdot 7 + 19 \)
\(69 = 71 + 7 - 9 \)
\(70 = ( 1^{7} + 9 ) \cdot 7 \)
\(71 = 79 - 1 - 7 \)
\(72 = 79 \cdot 1 - 7 \)
\(73 = 71 - 7 + 9 \)
\(74 = 77 \cdot 1 - \sqrt{9 }\)
\(75 = 71 + 7 - \sqrt{9 }\)
\(76 = 77 - 1^{9 }\)
\(77 = 1^{9} \cdot 77 \)
\(78 = 1^{9} + 77 \)
\(79 = 1^{7} \cdot 79 \)
\(80 = 97 - 17 \)
\(81 = 71 + 7 + \sqrt{9 }\)
\(82 = 77 - 1 + \sqrt{9 }!\)
\(83 = 77 \cdot 1 + \sqrt{9 }!\)
\(84 = ( 19 - 7 ) \cdot 7 \)
\(85 = 77 - 1 + 9 \)
\(86 = 77 \cdot 1 + 9 \)
\(87 = 71 + 7 + 9 \)
\(88 = \sqrt{\sqrt{9}^{1 + 7}} + 7 \)
\(89 = 97 - 1 - 7 \)
\(90 = ( 17 - 7 ) \cdot 9 \)
\(91 = \frac{ 91 }{ 7 } \cdot 7 \)
\(92 = \frac{ 7 }{ 7 } + 91 \)
\(93 = ?\)
\(94 = ?\)
\(95 = 17 \cdot \sqrt{9}! - 7 \)
\(96 = 17 + 79 \)
\(97 = 1^{7} \cdot 97 \)
\(98 = 1^{7} + 97 \)
\(99 = ?\)
\(100 = \sqrt{\sqrt{( 7 + \sqrt{9} )^{1 + 7 }}}\)