321930 + 291945 + 2171954 + 3041975 (1 - sin a )(1 - cos b ) 130307 + 140307 + x = + 130307 - 140307 + x x + 178408256 - 26614 x + 1332007 + x + 178381643 - 26612 x + 1332007 = (13 + 3) n - (13 - 3) n x+5 3 x+2 5 34 3 34