> <span class="op">*</span> <span class="op">(</span><span class="fl">0.5</span> <span class="op">+</span> <span class="va">x</span><span class="op">[</span>,<span class="fl">2</span><span class="op">]</span> <span class="op">-</span> <span class="va">x</span><span class="op">[</span>,<span class="fl">3</span><span class="op">]</span> <span class="op">-</span> <span class="va">x</span><span class="op">[</span>,<span class="fl">11</span><span class="op">]</span> <span class="op">+</span> <span class="va">x</