='r-in'><span class='va'>x3</span> <span class='op'>=</span> <span class='va'>x1</span><span class='op'>^</span><span class='fl'>2</span></span>
<span class='r-in'><span class='va'>x4</span> <span class='op'>=</span> <span class='va'>x2</span><span class='op'>^</span><span class='fl'>2</span></span>
<span class='r-in'><span class='va'>x5</span> <span class='op'>=</span> <span class='va'>x1</span><span class='op'>*</span><span class='va'>x2</span></span>
<span class='r-in'><span class='va'>y</span> <span cla