<span><span><span><span>k+<span>m2</span></span>−<span>4n</span></span>−<span>3m</span></span>+k</span><span>=<span><span><span><span><span><span>k+<span>m2</span></span>+</span>−<span>4n</span></span>+</span>−<span>3m</span></span>+k</span></span>Combine Like Terms:<span>=<span><span><span><span>k+<span>m2</span></span>+<span>−<span>4n</span></span></span>+<span>−<span>3m</span></span></span>+k</span></span><span>=<span><span><span><span>(<span>m2</span>)</span>+<span>(<span>k+k</span>)</span></span>+<span>(<span>−<span>3m</span></span>)</span></span>+<span>(<span>−<span>4n</span></span>)</span></span></span><span>=<span><span><span><span>m2</span>+<span>2k</span></span>+<span>−<span>3m</span></span></span>+<span>−<span>4n</span></span></span></span>Answer:<span>=<span><span><span><span>m2</span>+<span>2k</span></span>−<span>3m</span></span>−<span>4<span>n</span></span></span></span>