2x^5·x^5+(-x)^2·x·(-x)^7怎么算(点是乘号)

(x+2)(x-1)+(x+3)(x+1)=x·x-1 求x (5x-4)(2x+5)(3x-6)(2x-4)=(2x-4)(2x+5)·0.5 求x 3^x=2^x,求x.5^(x-1)·10^3x=8^x求x *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 2x^5·x^5+（-x）²·x·（-x)³计算 化简：〔（x^2+18x+72)÷（x+12)-(x^2+5x-6)÷(x-1)〕·(x^3-2x^2-x+1) (-x^2n-2)(-x)^5÷[x^n+1·x^n`(-x)] 3x·x-5x-122x·x·x-x·x-4x+3x·x·x-6x-5x·x+6x+64x·x+12x+7 2/(x+1)(x+3)+2/(x+3)(x+5)+·····+2/(x+2007)(x+2009) 求函数Y=（X·X-2X-1）/（X·X-5X-6）的值域? 2%=5%·x/10+x (1)(x^2+y)(-y+x^2)-(-x)^2·(-x^2) (2)(5x-3)(5x+3)-3x(3x-7) 怎么解 3-x/2x-4÷（x+2 - 5/x-2)(1/x+1 + 1/x-1)÷ x/x+11/x+1 - x+3/x²-1 · x²-2x+1/x²+4x+3（1/x - 1/2)÷（1- x²+4/4x ） （x+2y)(x-2y)(x^2-4y^2),其中x=2,y=-1（x+5)^2-(x-5)^2-5(2x+1)(2x-1)+x·(2x)^2,其中x=-1 先化简再求值：（x²+2x-8/x³+2x²+x）÷｛（x-2/x）·（x+4/x+1）｝其中x=-4/5其中x=-4/5 (x-5)(x-2) (x-5)(x+2) (180x-36*x)/(x+2x)*2x=(180x-36*x)/(x+2x)*x+36x 这个怎么解啊····