Introduction to polynomials

Which polynomial will be the sum of $4x^5+2x^3-x^2-5x+7$ and $6x^6-3x^2-11$?

Write down the coefficients of the resulting polynomial separated by space, ordered by ascending powers of $x$. For example, if you got $4x^2-3x+2$, write $2$ $-3$ $4$ in the answer field.

Note: include all intermediate powers of $x$ in your answer, even those with zero coefficient!