82 Test file number 156

  82.1 Problem number 148
  82.2 Problem number 170
  82.3 Problem number 171
  82.4 Problem number 172

Test folder name:

test_cases/5_Inverse_trig_functions/5.5_Inverse_secant/156_5.5.1_u-a+b_arcsec-c_x-^n