( -4 ) + ( -3 ) + ( -1 ) + ( -5 ) = -13( -5 ) + ( -2 ) + ( -5 ) + ( -1 ) = -13( -3 ) + ( -3 ) + ( -2 ) + ( -5 ) = -13( -1 ) + ( -2 ) + ( -2 ) + ( -8 ) = -13( -2 ) + ( -3 ) + ( -4 ) + ( -4 ) = -13( -3 ...