In a club, there are 69 people who can play Chinese chess, 52 people who can play international chess, 12 people who can’t play both kinds of chess, and 30 people who can play both kinds of chess. How many members are there in this club? ?
一个俱乐部里，会下中国象棋的有69人，会下国际象棋的有52人，有12人这两种棋都不会下，有30人这两种棋都会下，这个俱乐部共有成员多少人？
<gadget id="calculator">12 - 30</gadget>
<output>-18</output>

<gadget id="calculator">69 + 52 + (-18)</gadget>
<output>103</output>

<result>103</result>