计算(每题5分,共25分)(1)(2)(3)(4)(5)
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)-×.
解方程:.