All 100 targets have a solution.
\(1 = 7 - \frac{ 54 }{ 9 }\)
\(2 = 7 - \frac{ 45 }{ 9 }\)
\(3 = \sqrt{\frac{ 54 + 9 }{ 7 }}\)
\(4 = 5 - \frac{ \sqrt{49} }{ 7 }\)
\(5 = \sqrt{79 - 54 }\)
\(6 = \frac{ 45 - \sqrt{9} }{ 7 }\)
\(7 = 4^{\sqrt{9}} - 57 \)
\(8 = 57 - 49 \)
\(9 = \frac{ 54 + 9 }{ 7 }\)
\(10 = \frac{ 47 + \sqrt{9} }{ 5 }\)
\(11 = \frac{ 54 }{ \sqrt{9} } - 7 \)
\(12 = 59 - 47 \)
\(13 = \sqrt{74 + 95 }\)
\(14 = 49 - 5 \cdot 7 \)
\(15 = 74 - 59 \)
\(16 = ( 5 - 4 ) \cdot 7 + 9 \)
\(17 = \frac{ 95 + 4! }{ 7 }\)
\(18 = 7 \cdot 9 - 45 \)
\(19 = 94 - 75 \)
\(20 = \frac{ 7 + 9 }{ 4 } \cdot 5 \)
\(21 = 95 - 74 \)
\(22 = \sqrt{475 + 9 }\)
\(23 = \frac{ 97 - 5 }{ 4 }\)
\(24 = 45 - 7 \cdot \sqrt{9 }\)
\(25 = 79 - 54 \)
\(26 = 75 - 49 \)
\(27 = \frac{ 54 }{ 9 - 7 }\)
\(28 = \sqrt{49} \cdot 5 - 7 \)
\(29 = 45 - 7 - 9 \)
\(30 = 5 \cdot 7 + 4 - 9 \)
\(31 = \sqrt{954 + 7 }\)
\(32 = 47 - 5 \cdot \sqrt{9 }\)
\(33 = 47 - 5 - 9 \)
\(34 = 79 - 45 \)
\(35 = \frac{ 45 \cdot 7 }{ 9 }\)
\(36 = 4 \cdot 5 + 7 + 9 \)
\(37 = 94 - 57 \)
\(38 = 54 - 7 - 9 \)
\(39 = 75 - 4 \cdot 9 \)
\(40 = 5 \cdot 7 - 4 + 9 \)
\(41 = 45 - 7 + \sqrt{9 }\)
\(42 = \frac{ 54 \cdot 7 }{ 9 }\)
\(43 = 97 - 54 \)
\(44 = 57 - 4 - 9 \)
\(45 = \sqrt{45^{9 - 7 }}\)
\(46 = 57 - \sqrt{4} - 9 \)
\(47 = 45 - 7 + 9 \)
\(48 = 95 - 47 \)
\(49 = 45 + 7 - \sqrt{9 }\)
\(50 = 57 - \sqrt{49 }\)
\(51 = 47 - 5 + 9 \)
\(52 = 97 - 45 \)
\(53 = 59 - ( 7 - 4 )!\)
\(54 = \sqrt{49} \cdot 7 + 5 \)
\(55 = 45 + 7 + \sqrt{9 }\)
\(56 = 54 - 7 + 9 \)
\(57 = ( 4 - \sqrt{9} ) \cdot 57 \)
\(58 = 54 + 7 - \sqrt{9 }\)
\(59 = 79 - 4 \cdot 5 \)
\(60 = 74 - 5 - 9 \)
\(61 = 45 + 7 + 9 \)
\(62 = 57 - 4 + 9 \)
\(63 = ( 9 - 4 )! - 57 \)
\(64 = \sqrt{49} + 57 \)
\(65 = ( 7 - 4 )! + 59 \)
\(66 = 7 \cdot \sqrt{9} + 45 \)
\(67 = 95 - 4 \cdot 7 \)
\(68 = 75 - \sqrt{49 }\)
\(69 = 4 \cdot \sqrt{9} + 57 \)
\(70 = 54 + 7 + 9 \)
\(71 = ( 9 - 5 )! + 47 \)
\(72 = 57 + 4! - 9 \)
\(73 = \sqrt{4} \cdot 7 + 59 \)
\(74 = 75 - 4 + \sqrt{9 }\)
\(75 = 7 \cdot \sqrt{9} + 54 \)
\(76 = \frac{ 57 \cdot 4 }{ \sqrt{9 } }\)
\(77 = 97 - 4 \cdot 5 \)
\(78 = 74 - 5 + 9 \)
\(79 = ( 5 - 4 ) \cdot 79 \)
\(80 = 75 - 4 + 9 \)
\(81 = \sqrt{4 \cdot 9} + 75 \)
\(82 = \sqrt{49} + 75 \)
\(83 = 4 \cdot 5 + 7 \cdot 9 \)
\(84 = 5 \cdot 7 + 49 \)
\(85 = 9^{7 - 5} + 4 \)
\(86 = 75 + \sqrt{4} + 9 \)
\(87 = 4 \cdot 7 + 59 \)
\(88 = 74 + 5 + 9 \)
\(89 = 5 \cdot \sqrt{9} + 74 \)
\(90 = ( 9 - 7 ) \cdot 45 \)
\(91 = \sqrt{49 + 5!} \cdot 7 \)
\(92 = 5 \cdot 9 + 47 \)
\(93 = 4 \cdot 9 + 57 \)
\(94 = ( 5 - \sqrt{9} ) \cdot 47 \)
\(95 = ( 4 \cdot 7 - 9 ) \cdot 5 \)
\(96 = 94 - 5 + 7 \)
\(97 = ( 5 - 4 ) \cdot 97 \)
\(98 = ( 7 - 5 ) \cdot 49 \)
\(99 = 4 \cdot 5 + 79 \)
\(100 = \frac{ 75 \cdot 4 }{ \sqrt{9 } }\)