Expanding the expression, we get:
а^9 - 9а^5 - (а^9 + 3а^4 - 9а^5 - 27)
Simplifying further:
а^9 - 9а^5 - а^9 - 3а^4 + 9а^5 + 27
Combining like terms:
-3а^4 + 27
So, the final simplified expression is -3а^4 + 27.
Expanding the expression, we get:
а^9 - 9а^5 - (а^9 + 3а^4 - 9а^5 - 27)
Simplifying further:
а^9 - 9а^5 - а^9 - 3а^4 + 9а^5 + 27
Combining like terms:
-3а^4 + 27
So, the final simplified expression is -3а^4 + 27.