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+ = += += -= -(+)= -= -(-)= += - （-）= + + = = = + = + = + += += = += - = -=+= -= -=+ （ + ）= -= 1-= += -= +=-（-）= -（+）= += 1 1 += + = ( )= 11 = ( )=（）= += -= += -（-）=-（+）= += = 483= 613= += 57+34= 2415+6=+(11)= 2+1+3= 4+1+3= 1024=+ = = += = = 51= 62= 75= 72= 3+4= 1425= 53+4= 823= 7(3+2)+3= 12(83) = 1023= (9+3)(31)=()= 32123= 15+12= +=+= ( )= 11 = ( )=+-= -+= += -（+）=+（ ）= -（+）= -（+）= 5 -=-+ = -+- = +- = -（+）=X= X+= X= X= +x= -x= x-=X3= 3 X9=4 x7=4 4X=2 7X=2X+1=6 13X=5+2 2+X+4=12 (+)X=3(X+3)= X - 1= 4 1 - - x = 1 X= X+= X = X= +X= -X= X-=X+= （）=
