68 Test file number 124

  68.1 Problem number 16
  68.2 Problem number 17
  68.3 Problem number 18
  68.4 Problem number 19
  68.5 Problem number 20
  68.6 Problem number 21
  68.7 Problem number 22
  68.8 Problem number 23
  68.9 Problem number 47
  68.10 Problem number 48
  68.11 Problem number 49
  68.12 Problem number 50
  68.13 Problem number 51
  68.14 Problem number 52
  68.15 Problem number 53
  68.16 Problem number 65
  68.17 Problem number 66
  68.18 Problem number 67
  68.19 Problem number 68
  68.20 Problem number 69
  68.21 Problem number 70

Test folder name:

test_cases/4_Trig_functions/4.5_Secant/124_4.5.4.1-a+b_sec-^m-A+B_sec+C_sec^2-