Formulas arranged according to certain rules: 4+2, 5+8, 6+14, 7+20, ..., then what is the 100th formula.
按一定的规律排列的算式：4+2，5+8，6+14，7+20，…，那么第100个算式是多少．
<gadget id="calculator">4 + 99</gadget>
<output>103</output>

<gadget id="calculator">99 * 6</gadget>
<output>594</output>

<gadget id="calculator">2 + 594</gadget>
<output>596</output>

<gadget id="calculator">103 + 596</gadget>
<output>699</output>

<result>699</result>