All 100 targets have a solution.
\(1 = 9 - ( 12 - 4 )\)
\(2 = 9 - \frac{ 14 }{ 2 }\)
\(3 = \frac{ 21 }{ \sqrt{49 } }\)
\(4 = 2 \cdot 9 - 14 \)
\(5 = 24 - 19 \)
\(6 = 9 - \frac{ 12 }{ 4 }\)
\(7 = \sqrt{91 - 42 }\)
\(8 = \frac{ 192 }{ 4 ! }\)
\(9 = 1^{24} \cdot 9 \)
\(10 = ( 14 - 9 ) \cdot 2 \)
\(11 = 19 - 2 \cdot 4 \)
\(12 = 41 - 29 \)
\(13 = 19 - 2 - 4 \)
\(14 = \sqrt{192 + 4 }\)
\(15 = 29 - 14 \)
\(16 = \frac{ 14 }{ 2 } + 9 \)
\(17 = 12 - 4 + 9 \)
\(18 = \frac{ 4! }{ 12 } \cdot 9 \)
\(19 = 12 + \sqrt{49 }\)
\(20 = 2 \cdot \sqrt{9} + 14 \)
\(21 = 14 - 2 + 9 \)
\(22 = \frac{ 92 }{ 4 } - 1 \)
\(23 = 42 - 19 \)
\(24 = 4 \cdot 9 - 12 \)
\(25 = 12 + 4 + 9 \)
\(26 = 21 - 4 + 9 \)
\(27 = \frac{ 12 }{ 4 } \cdot 9 \)
\(28 = 49 - 21 \)
\(29 = 1^{4} \cdot 29 \)
\(30 = ( 19 - 4 ) \cdot 2 \)
\(31 = 14 \cdot 2 + \sqrt{9 }\)
\(32 = 2^{14 - 9 }\)
\(33 = 24 \cdot 1 + 9 \)
\(34 = 19 \cdot 2 - 4 \)
\(35 = 2^{4} + 19 \)
\(36 = \sqrt{12 + 4} \cdot 9 \)
\(37 = 49 - 12 \)
\(38 = \frac{ 912 }{ 4 ! }\)
\(39 = 12 \cdot 4 - 9 \)
\(40 = 9^{2} - 41 \)
\(41 = 42 - 1^{9 }\)
\(42 = 19 \cdot 2 + 4 \)
\(43 = 14 + 29 \)
\(44 = 14 \cdot \sqrt{9} + 2 \)
\(45 = 12 + 4! + 9 \)
\(46 = ( 14 + 9 ) \cdot 2 \)
\(47 = 49 \cdot 1 - 2 \)
\(48 = \frac{ 192 }{ 4 }\)
\(49 = 91 - 42 \)
\(50 = 42 - 1 + 9 \)
\(51 = 92 - 41 \)
\(52 = 41 + 2 + 9 \)
\(53 = 29 \cdot 1 + 4 !\)
\(54 = ( \frac{ 12 }{ 4 } )! \cdot 9 \)
\(55 = ( 1 + 2 )! + 49 \)
\(56 = \frac{ 21 \cdot 4! }{ 9 }\)
\(57 = 12 \cdot 4 + 9 \)
\(58 = 29 \cdot 1 \cdot \sqrt{4 }\)
\(59 = 2 \cdot 9 + 41 \)
\(60 = ( 9 - 4 ) \cdot 12 \)
\(61 = 12 + 49 \)
\(62 = 19 \cdot 2 + 4 !\)
\(63 = \frac{ 14 }{ 2 } \cdot 9 \)
\(64 = 4^{12 - 9 }\)
\(65 = 91 - 2 - 4 !\)
\(66 = ( 1 + \sqrt{9} )! + 42 \)
\(67 = 91 - 24 \)
\(68 = ( 19 - 2 ) \cdot 4 \)
\(69 = 9^{\sqrt{4}} - 12 \)
\(70 = 21 + 49 \)
\(71 = 24 \cdot \sqrt{9} - 1 \)
\(72 = ( 12 - 4 ) \cdot 9 \)
\(73 = 94 - 21 \)
\(74 = 19 \cdot 4 - 2 \)
\(75 = 21 \cdot 4 - 9 \)
\(76 = 4^{\sqrt{9}} + 12 \)
\(77 = 9^{1 \cdot 2} - 4 \)
\(78 = 92 - 14 \)
\(79 = 41 \cdot 2 - \sqrt{9 }\)
\(80 = ( 1 + 9 ) \cdot 2 \cdot 4 \)
\(81 = ( 12 - 9 )^{4 }\)
\(82 = 94 - 12 \)
\(83 = 91 - 2 \cdot 4 \)
\(84 = 12 \cdot \sqrt{49 }\)
\(85 = 91 - 2 - 4 \)
\(86 = ( 19 + 4! ) \cdot 2 \)
\(87 = ( 4 - 1 ) \cdot 29 \)
\(88 = 92 \cdot 1 - 4 \)
\(89 = 91 + 2 - 4 \)
\(90 = ( 12 - \sqrt{4} ) \cdot 9 \)
\(91 = 41 \cdot 2 + 9 \)
\(92 = 1^{4} \cdot 92 \)
\(93 = 21 \cdot 4 + 9 \)
\(94 = ( 2 - 1 ) \cdot 94 \)
\(95 = 9^{2} + 14 \)
\(96 = \frac{ 192 }{ \sqrt{4 } }\)
\(97 = \frac{ 194 }{ 2 }\)
\(98 = ( 9 - 2 ) \cdot 14 \)
\(99 = 49 \cdot 2 + 1 \)
\(100 = ( 41 + 9 ) \cdot 2 \)