12 Test file number 49

  12.1 Problem number 10
  12.2 Problem number 14
  12.3 Problem number 15

Test folder name:

test_cases/1_Algebraic_functions/1.2_Trinomial_products/1.2.3_General/49_1.2.3.5_P-x-d_x-^m-a+b_x^n+c_x^-2_n-^p