The polynomial you provided is already listed with powers in descending order. The expression is:
\[ x^7 - 4x^5 + 2x^4 + 4x^3 - 10 \]
In this polynomial:
- The term \( x^7 \) has the highest degree (7).
- The next term is \( -4x^5 \) with a degree of 5.
- Then, we have \( 2x^4 \) with a degree of 4.
- Next is \( 4x^3 \) with a degree of 3.
- Finally, the constant term is \( -10 \), which has a degree of 0.
Thus, the polynomial is presented correctly in descending order of the powers of \( x \).