正方体：<span class="equation-text" contenteditable="false" data-index="0" data-equation="6a^2"><span></span><span></span></span>
长方体：2（ab+bc+ac）
圆柱体：<span class="equation-text" contenteditable="false" data-index="0" data-equation="2πR^2+2πRh"><span></span><span></span></span>
<span class="equation-text" contenteditable="false" data-index="0" data-equation="\ast"><span></span><span></span></span>球体：<span class="equation-text" data-index="1" data-equation="4πR^3" contenteditable="false"><span></span><span></span></span>
