yanyijìtuoing yu2x+y=9;y+2=0;y=x+z;0.g((-20)/(10))/(10+1) mingje fangexing wangze1renzhiduyuán zhujùcquánzheng bianyan suanfeijianhud ruiwei guosoujqiu yinban ttújie duanzhen IYjan shuyi wenmin gantí qǔming xianwú liáowen heou ranwen xianz...