Simplify (3n^2+9+5n^4-3n)+(-9n^4-7-5n^2)

$(3 n^{2} + 9 + 5 n^{4} - 3 n) + (- 9 n^{4} - 7 - 5 n^{2})$

Step 1

Remove parentheses.

$3 n^{2} + 9 + 5 n^{4} - 3 n - 9 n^{4} - 7 - 5 n^{2}$

Step 2

Subtract $5 n^{2}$ from $3 n^{2}$ .

$- 2 n^{2} + 9 + 5 n^{4} - 3 n - 9 n^{4} - 7$

Step 3

Subtract $7$ from $9$ .

$- 2 n^{2} + 5 n^{4} - 3 n - 9 n^{4} + 2$

Step 4

Subtract $9 n^{4}$ from $5 n^{4}$ .

$- 2 n^{2} - 4 n^{4} - 3 n + 2$

Step 5

Reorder $- 2 n^{2}$ and $- 4 n^{4}$ .

$- 4 n^{4} - 2 n^{2} - 3 n + 2$