Automattic / jetpack

	$s     = 0;

	$latex = latex_entity_decode( $latex );

	if ( preg_match( '/.+(&fg=[0-9a-f]{6}).*/i', $latex, $fg_matches ) ) {

		$fg    = substr( $fg_matches[1], 4 );

		$latex = str_replace( $fg_matches[1], '', $latex );

	}

	if ( preg_match( '/.+(&bg=[0-9a-f]{6}).*/i', $latex, $bg_matches ) ) {

		$bg    = substr( $bg_matches[1], 4 );

		$latex = str_replace( $bg_matches[1], '', $latex );

		$fg    = substr( $fg_matches[1], 4 );

		$latex = str_replace( $fg_matches[1], '', $latex );

	}

	if ( preg_match( '/.+(&bg=[0-9a-f]{6}).*/i', $latex, $bg_matches ) ) {

		$bg    = substr( $bg_matches[1], 4 );

		$latex = str_replace( $bg_matches[1], '', $latex );

	}

	if ( preg_match( '/.+(&s=[0-9-]{1,2}).*/i', $latex, $s_matches ) ) {

		$s     = (int) substr( $s_matches[1], 3 );

		$latex = str_replace( $s_matches[1], '', $latex );

		$bg    = substr( $bg_matches[1], 4 );

		$latex = str_replace( $bg_matches[1], '', $latex );

	}

	if ( preg_match( '/.+(&s=[0-9-]{1,2}).*/i', $latex, $s_matches ) ) {

		$s     = (int) substr( $s_matches[1], 3 );

		$latex = str_replace( $s_matches[1], '', $latex );

	}

	return latex_render( $latex, $fg, $bg, $s );

}