计算: ( 2 - 3 ) ( 2 + 3 ) + tan 60 ° - ( π - 2 3 ) 0
计算:|-1|+(+1)0-sin30°.
计算:.
计算:(π-2014)0-2tan45°+()-1.
计算: (1)(2x-1)2+(x+3)(x-3)-(4x+3)(x-6) (2).
计算: (1)(-)2-+ (2)-×.