/span> <span>&#45;&gt;</span> <span class="type-var">'d</span>)</span>)</span> <span>&#45;&gt;</span> <span>(<span>(<span class="type-var">'e</span> * <span class="type-var">'a</span>)</span> * <span>(<span class="type-var">'f</span> * <span class="type-var">'c</span>)</span>)</span> <span>&#45;&gt;</span> <span>(<span class="type-var">'e</span> * <span class="type-var">'b</span>)</span> * <span>(<span class="type-var">'f</span> * <span class="type-var">'d</span>)</span></code></dt><dt class="spec value" id