// print A^2
  	BigInteger answer8 = prod(A, A);
  	printBigInteger(out, answer8);
  	fprintf(out, "\n");

  	// print B^2
  	BigInteger answer9 = prod(B, B);
  	printBigInteger(out, answer9);
  	fprintf(out, "\n");

  	// print 9A^4 + 16B^5
  	BigInteger fourthPower1 = prod(answer8, answer8);
  	BigInteger fourthPower2 = prod(answer9, answer9);
  	BigInteger fifthPower = prod(answer9, B);
  	BigInteger nine = stringToBigInteger("9");
  	BigInteger sixteen = stringToBigInteger("16");
  	BigInteger partA = prod(fourthPower1, nine);
  	BigInteger partB = prod(fifthPower, sixteen);
  	BigInteger answer10 = sum(partA, partB);
  	printBigInteger(out, answer10);
  	freeBigInteger(&answer8);
  	freeBigInteger(&answer9);
  	freeBigInteger(&fourthPower1);
  	freeBigInteger(&fourthPower2);
  	freeBigInteger(&fifthPower);
  	freeBigInteger(&nine);
  	freeBigInteger(&sixteen);
  	freeBigInteger(&partA);
  	freeBigInteger(&partB);
  	freeBigInteger(&answer10);
  	fprintf(out, "\n");