28 Test file number 43

  28.1 Problem number 37
  28.2 Problem number 38
  28.3 Problem number 131
  28.4 Problem number 132

Test folder name:

test_cases/1_Algebraic_functions/1.2_Trinomial_products/1.2.2_Quartic/43_1.2.2.6_P-x-d_x-^m-a+b_x^2+c_x^4-^p