3 Test file number 14

  3.1 Problem number 910
  3.2 Problem number 911
  3.3 Problem number 912

Test folder name:

test_cases/1_Algebraic_functions/1.1_Binomial_products/1.1.1_Linear/14_1.1.1.3-a+b_x-^m-c+d_x-^n-e+f_x-^p