an class="op">*</span><span class="va">CR</span> <span class="op">+</span> <span class="va">SH</span><span class="op">*</span><span class="va">SP</span><span class="op">*</span><span class="va">SR</span>, <span class="va">SH</span><span class="op">*</span><span class="va">CP</span>, <span class="va">CH</span><span class="op">*</span><span class="va">SR</span> <span class="op">-</span> <span class="va">SH</span><span class="op">*</span><span class="va">SP</span><span class="op">*</span><span class="va">CR</s