Exclude Javascript from Front Page

Hello all

I have many javascript who load in my front page there is some that is
used only in single so i want exclude some javascrit to load in
front page her is what i did but dosent work !

<?PHP is_front_page(); { ?>
    </script>
	<script type='text/javascript' src='https://apis.google.com/js/plusone.js'></script>
	<script type='text/javascript' src='https://platform.twitter.com/widgets.js'></script>
        <script type="text/javascript" src="https://assets.pinterest.com/js/pinit.js"></script>
	<script type="text/javascript"> <?PHP } ?>

Thanks For help