Excel自动生成100以内加减混合带括号运算，结果不大于100、不小于0.如图所示。求大神解答
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=CHOOSE(RANDBETWEEN(1,4),RANDBETWEEN(10,40)&"+("&RANDBETWEEN(10,30)&"+"&RANDBETWEEN(10,30)&")",RANDBETWEEN(10,30)&"+("&RANDBETWEEN(50,99)&"-"&RANDBETWEEN(30,50)&")",RANDBETWEEN(60,99)&"-("&RANDBETWEEN(10,30)&"+"&RANDBETWEEN(10,30)&")",RANDBETWEEN(60,99)&"-("&RANDBETWEEN(60,99)&"-"&RANDBETWEEN(40,60)&")")&"="
=CHOOSE(RANDBETWEEN(1,4),RANDBETWEEN(10,40)&"+("&RANDBETWEEN(10,30)&"+"&RANDBETWEEN(10,30)&")",RANDBETWEEN(10,30)&"+("&RANDBETWEEN(50,99)&"-"&RANDBETWEEN(30,50)&")",RANDBETWEEN(60,99)&"-("&RANDBETWEEN(10,30)&"+"&RANDBETWEEN(10,30)&")",RANDBETWEEN(60,99)&"-("&RANDBETWEEN(60,99)&"-"&RANDBETWEEN(40,60)&")")&"="
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