1)4x-9 there are no like terms 2)(<span><span>−x</span>+1</span>)<span>(<span><span><span><span><span>5<span>x4</span></span>+<span>5<span>x3</span></span></span>−<span>4<span>x2</span></span></span>−<span>4x</span></span>−4</span><span>)</span></span>
