432×536=231.552.
231552:432=536
231552:536=432
48-(345+18)=48-363=-315
885-(25+34899)=885-34934=-34049
(573+233)-273=806-533
643-(70+343)=643-413=230
484-45-84=439-84=355
855-(185+450)=855-635=220
1)a^2/2b * (1/2abx + 1/2aby)
2)(a^3bx)/4b + (a^3by)/4b = 4a^3 * x + 4a^3 * y