化简:|x+5|+|x-7|
|x+5|+|x-7|+|x+10|化简
(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简
(x+2)(x-12)+(x+7)(x+8)+(x+5)(x-10),化简.
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
化简:9x-12x+5x,3x-5x-2+5x+8,3x+5+2x+3-7-11x
化简:3x(x的平方+2x+7)-(x的平方+7)(3x-5)
化简sin(x)(cos(x)+cos(3x)+cos(5x)+cos(7x))
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
化简:|x+5|+|x-7|+|x+10|
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
5X+7-(4x+0.18)化简
化简(-2x^2)+3x+2)-3(7x^2-5x-1)-(4x^2-x+6)