91 Test file number 180

  91.1 Problem number 139
  91.2 Problem number 141
  91.3 Problem number 145
  91.4 Problem number 147

Test folder name:

test_cases/6_Hyperbolic_functions/6.5_Hyperbolic_secant/180_6.5.7-d_hyper-^m-a+b-c_sech-^n-^p