81 Test file number 137

  81.1 Problem number 19
  81.2 Problem number 20
  81.3 Problem number 21
  81.4 Problem number 28
  81.5 Problem number 29
  81.6 Problem number 30
  81.7 Problem number 76
  81.8 Problem number 77
  81.9 Problem number 78
  81.10 Problem number 93
  81.11 Problem number 94
  81.12 Problem number 95
  81.13 Problem number 96
  81.14 Problem number 142
  81.15 Problem number 143
  81.16 Problem number 144
  81.17 Problem number 150
  81.18 Problem number 151
  81.19 Problem number 152
  81.20 Problem number 153
  81.21 Problem number 160
  81.22 Problem number 161
  81.23 Problem number 162
  81.24 Problem number 275
  81.25 Problem number 375

Test folder name:

test_cases/4_Trig_functions/4.7_Miscellaneous/137_4.7.3-c+d_x-^m_trig^n_trig^p