Ответ:

№a+b+c+da−b+c−d−a−b−c+d
1\(2z+x-y+7\)\(2z-x-y-7\)\(-2z-x+y+7\)
2\(3x-8-6y+3.5z\)\(3x+8-6y-3.5z\)\(-3x+8+6y+3.5z\)
3\(-6x-3y+2.5+z\)\(-6x+3y+2.5-z\)\(6x+3y-2.5+z\)
4\(-2.5y+5-z+x\)\(-2.5y-5-z-x\)\(2.5y-5+z+x\)
5\(10-9x+y+0.6z\)\(10+9x+y-0.6z\)\(-10+9x-y+0.6z\)