step 1a: 10,111,101^2=102,234,363,432,201 . . . step 1b: 111,011,001^2=1,232,346,434,541,222,011 . . . 1c...1a - 1b: -1,232,244,200,177,789,800 . . . . #### 2a: 1423^5=5,875,898,994,140,625 . . . . 2b: 4213^5=1,327,263,940,870,952,293 . . . 2c...2a -2b=-1,321,388,041,876,811,668 . . . ### hav negativ in front, so me chaenj em tu positiv now & add em . . . 3a...1c+2x=2,553,632,242,054,601,468 . . . step 4...add 9783 tu 3a...2,553,632,242,054,611,251