Negation Selector in CSS

:not

Given code:

<ul>
	<li>1</li>
	<li class="elem">2</li>
	<li>3</li>
	<li>4</li>
	<li class="elem">5</li>
	<li>6</li>
	<li>7</li>
	<li class="elem">8</li>
	<li>9</li>
</ul>

Write a selector that will select all li except li with class elem.

Given code:

<ul>
	<li>1</li>
	<li>2</li>
	<li>3</li>
	<li>4</li>
	<li>5</li>
	<li>6</li>
	<li>7</li>
	<li>8</li>
	<li>9</li>
</ul>

Write a selector that will select all li except the first one.

Given code:

<ul>
	<li>1</li>
	<li>2</li>
	<li>3</li>
	<li>4</li>
	<li>5</li>
	<li>6</li>
	<li>7</li>
	<li>8</li>
	<li>9</li>
</ul>

Write a selector that will select all li except the first and last.