a-(192+503+1000)=496+25+375+104

a - ( 192 + 503 + 1000 ) = 496 + 25 + 375 + 104
a - ( 695 + 1000 ) = 521 + 375 + 104
a - 1695 = 896 + 104
a - 1695 = 1000
a = 1000 + 1695
a = 2695