<h2>4x + x + 17</h2><h2 /><h3>4x is a term</h3><h3>The 4 is a coefficient</h3><h3>The x is a variable</h3><h3>The other x is also a variable</h3><h3>The lonely x actually has an invisible coefficient (Which is 1)</h3><h3>The 17 is a constant</h3><h3>The whole equation is an expression :)</h3>
