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5r+9r^{3}-4r^{3}-7r
To find the opposite of 4r^{3}+7r, find the opposite of each term.
5r+5r^{3}-7r
Combine 9r^{3} and -4r^{3} to get 5r^{3}.
-2r+5r^{3}
Combine 5r and -7r to get -2r.
5r+9r^{3}-4r^{3}-7r
To find the opposite of 4r^{3}+7r, find the opposite of each term.
5r+5r^{3}-7r
Combine 9r^{3} and -4r^{3} to get 5r^{3}.
-2r+5r^{3}
Combine 5r and -7r to get -2r.