17 Test file number 190

  17.1 Problem number 519
  17.2 Problem number 520
  17.3 Problem number 521

Test folder name:

test_cases/7_Inverse_hyperbolic_functions/7.2_Inverse_hyperbolic_cosine/190_7.2.4-f_x-^m-d+e_x^2-^p-a+b_arccosh-c_x-^n