计算并输出方程 X*X+Y*Y+Z*Z=2008 的所有的满足条件正整数解.

计算并输出方程 X*X+Y*Y+Z*Z=2008 的所有的满足条件正整数解. 计算（x+y-z)(x-y-z) 计算：(x-y+z)(-x+y+z) 用乘法公式计算(x+y)(x-y)+(-y-z)(-y+z)+(-x+z)(z+x) 计算：（X+y+z)(-x+y+z)(x-y+z)(x+y-z) 计算(x+y+z)(-x+y+z)(x-y+z)(x+y-z) 计算(x+y-z)(z-x-y) ,(x+y-z)(z-x+y) 设z=z(x,y)由方程φ(x/z,y/z) 确定,证明x*∂z/∂x+y*∂z/∂y=z 解方程 x(x+y+z)=6 y(x+y+z)=12 z(x+y+z)=18 求不定式方程（x+y+z)(x-y+z)(x+y-z)(-x+y+z)=2006 隐函数求导 设f可微,且方程y+z=xf(y^2-z^2)确定了函数z=z(x,y),隐函数求导 设f可微,且方程y+z=xf(y^2-z^2)确定了函数z=z(x,y),计算xδz/δx+zδz/δy (x+y-z)(x-y+z)= 计算:x^2/(x-y)(x-z)+y^2/(y-x)(y-z)+z^2/(z-x)(z-y) 计算:(y-x)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(x+y-2z)(y+z-2x)+(x-z)(y-z)/(y+z-2x)(x-2y+z) 设方程z^y=y^x 确定函数z=z(x,y) ,求∂z/∂x 计算（x-y-z)^2 计算(X+Y+Z)平方 C语言：下面的功能是计算函数F（x,y,z）=（x+y）*（x+y）+（x+y）*（x-y）的值并输出.float f（float,float）；main（）{float x,y,z,sum；scanf（%f%f%f,&x&y&z）;sum=_____________;printf(sum=%f' ,sum);}float f(float a,