计算：+i,x)M1W1A+\
100-（30-10）+i,x)M1W1A+\
算式：提示,D/f'N7h'i-x+k)r6]+i,x)M1W1A+\
=0W7e*c4_0n5P6o,^4@+i,x)M1W1A+\