Need help with 74

sin 2x 73. dx 74. In(tan x) 1 + cos*x 7/4 sin x cos x dx x 2 75. dx 76. Vx + 1 + vx x6 + 3x3 + 2 dx 1 + x2 77. dx 78. 1 + 2ex - p-x dx In(x + 1) 79. 1 + ex dx 80. dx x + arcsin x 4* + 10* 81. dx 82. dx VI - x2 2 x dx x 2 83. 84. dx x In x - x Vx2 + 1 1 + sin x 85. dx 86. dx /1tex 1 - sin x