All 100 targets have a solution.
\(1 = 47 - 46 \)
\(2 = 44 - 6 \cdot 7 \)
\(3 = 7^{\sqrt{4}} - 46 \)
\(4 = ( \sqrt{64} - 7 ) \cdot 4 \)
\(5 = 7 - \frac{ \sqrt{64} }{ 4 }\)
\(6 = \frac{ 46 - 4 }{ 7 }\)
\(7 = \sqrt{46 - 4 + 7 }\)
\(8 = \sqrt{74 - 4 - 6 }\)
\(9 = \frac{ 64 }{ 4 } - 7 \)
\(10 = 74 - 64 \)
\(11 = 47 - 6^{\sqrt{4 }}\)
\(12 = \frac{ 74 - \sqrt{4} }{ 6 }\)
\(13 = \frac{ 74 + 4 }{ 6 }\)
\(14 = \frac{ \sqrt{64} }{ 4 } \cdot 7 \)
\(15 = \frac{ 76 }{ 4 } - 4 \)
\(16 = \frac{ 46 }{ \sqrt{4} } - 7 \)
\(17 = 64 - 47 \)
\(18 = 46 - 4 \cdot 7 \)
\(19 = \sqrt{64} + 4 + 7 \)
\(20 = \frac{ 74 + 6 }{ 4 }\)
\(21 = \sqrt{447 - 6 }\)
\(22 = ( 7 - 4 ) \cdot 6 + 4 \)
\(23 = 67 - 44 \)
\(24 = 744 - 6 !\)
\(25 = \sqrt{64} \cdot 4 - 7 \)
\(26 = \sqrt{674 + \sqrt{4 }}\)
\(27 = 4 \cdot 6 - 4 + 7 \)
\(28 = 74 - 46 \)
\(29 = 46 - 4! + 7 \)
\(30 = \frac{ 46 }{ \sqrt{4} } + 7 \)
\(31 = 44 - 6 - 7 \)
\(32 = 76 - 44 \)
\(33 = 64 - 4! - 7 \)
\(34 = \frac{ 74 - 6 }{ \sqrt{4 } }\)
\(35 = 46 - 4 - 7 \)
\(36 = 64 - 4 \cdot 7 \)
\(37 = 47 - 4 - 6 \)
\(38 = 74 - 6^{\sqrt{4 }}\)
\(39 = 47 - \sqrt{64 }\)
\(40 = 46 - ( 7 - 4 )!\)
\(41 = 46 + \sqrt{4} - 7 \)
\(42 = \frac{ 76 }{ \sqrt{4} } + 4 \)
\(43 = 44 + 6 - 7 \)
\(44 = ( 7 - 6 ) \cdot 44 \)
\(45 = 44 - 6 + 7 \)
\(46 = 4 \cdot 7 + 4! - 6 \)
\(47 = \sqrt{47^{6 - 4 }}\)
\(48 = 76 - 4! - 4 \)
\(49 = 46 - 4 + 7 \)
\(50 = 74 - 4 \cdot 6 \)
\(51 = 67 - 4 \cdot 4 \)
\(52 = ( 7 - 4 )! + 46 \)
\(53 = 64 - 4 - 7 \)
\(54 = ( 4 \cdot 4 - 7 ) \cdot 6 \)
\(55 = 47 + \sqrt{64 }\)
\(56 = 74 - 4! + 6 \)
\(57 = 44 + 6 + 7 \)
\(58 = 64 - ( 7 - 4 )!\)
\(59 = 67 - 4 - 4 \)
\(60 = 76 - 4 \cdot 4 \)
\(61 = 64 + 4 - 7 \)
\(62 = 74 - \sqrt{4} \cdot 6 \)
\(63 = 46 + 4! - 7 \)
\(64 = 74 - 4 - 6 \)
\(65 = 47 + 4! - 6 \)
\(66 = 74 - \sqrt{64 }\)
\(67 = 64 - 4 + 7 \)
\(68 = \frac{ 4 }{ 4 } + 67 \)
\(69 = 64 - \sqrt{4} + 7 \)
\(70 = ( 7 - 4 )! + 64 \)
\(71 = 4 \cdot 6 + 47 \)
\(72 = 74 + 4 - 6 \)
\(73 = 64 + \sqrt{4} + 7 \)
\(74 = 4 \cdot 7 + 46 \)
\(75 = 64 + 4 + 7 \)
\(76 = 74 - 4 + 6 \)
\(77 = \frac{ 4 }{ 4 } + 76 \)
\(78 = ( 46 - 7 ) \cdot \sqrt{4 }\)
\(79 = \frac{ 474 }{ 6 }\)
\(80 = \sqrt{4 \cdot 4} + 76 \)
\(81 = 64 + 4! - 7 \)
\(82 = \sqrt{64} + 74 \)
\(83 = 4 \cdot 4 + 67 \)
\(84 = 74 + 4 + 6 \)
\(85 = 46 \cdot \sqrt{4} - 7 \)
\(86 = 6 \cdot 7 + 44 \)
\(87 = 67 - 4 + 4 !\)
\(88 = 47 \cdot \sqrt{4} - 6 \)
\(89 = 4 \cdot 4 \cdot 6 - 7 \)
\(90 = ( 4 + 4 + 7 ) \cdot 6 \)
\(91 = \sqrt{4 \cdot 4}! + 67 \)
\(92 = \frac{ 644 }{ 7 }\)
\(93 = 46 + 47 \)
\(94 = ( 6 - 4 ) \cdot 47 \)
\(95 = 7^{\sqrt{4}} + 46 \)
\(96 = 76 - 4 + 4 !\)
\(97 = 4! \cdot 6 - 47 \)
\(98 = 4 \cdot 6 + 74 \)
\(99 = 46 \cdot \sqrt{4} + 7 \)
\(100 = 47 \cdot \sqrt{4} + 6 \)