2 Test file number 66

  2.1 Problem number 203
  2.2 Problem number 204
  2.3 Problem number 205
  2.4 Problem number 281
  2.5 Problem number 282
  2.6 Problem number 283

Test folder name:

test_cases/4_Trig_functions/4.1_Sine/66_4.1.10-c+d_x-^m-a+b_sin-^n