(1) 8 + ( 1 2 ) - 1 - 2 cos 45 ° - ( π -2016 ) 0
(2)2y2+4y=y+2.
计算: (1)(-)2-+ (2)-×.
解方程:.
计算:(1) (2)
计算:(+1)(2-)
简便计算: (1) (2)