: arial; font-style: italic;">expr</span>(<span
 style="font-style: italic; font-weight: bold;">L</span>)) : <big><span
 style="font-family: script mt bold;">P</span></big><span
 style="font-family: arial; font-style: italic;">expr</span>(<span
 style="font-weight: bold; font-style: italic;">L</span>) &times;<big><span
 style="font-family: script mt bold;"> P</span></big><span
 style="font-family: arial; font-style: italic;">expr</span>(<span
 style="font-weight: bold; font-style: italic;">L</span>) &#8594;