s="token keyword">infix </span><span class="token keyword">fun </span><a href="subtract.html"><span class="token function">subtract</span></a><span class="token punctuation">(</span><span class="parameters "><span class="parameter ">expression<span class="token operator">: </span><a href="index.html">Expression</a></span></span><span class="token punctuation">)</span><span class="token operator">: </span><a href="index.html">Expression</a><span class="clearfix"><span class="floating-right">(<a href="https:/