What should be added to `2xy+3yz+4zx+5xyz` to get `x+y+z+2xy+3yz+zx-xyz`?

Find the value of : 2x xx 3yz xx 4zx

Add: 7xy + 5yz - 3zx, 4yz + 9zx - 4y, - 3xz + 5x - 2xy

If yz - zx = 3 and zx - xy = 4, then xy - yz =

Find the sum of the following algebraic expressions : 4xy - 3yz + 2zx , 2xy - yz - zx , - xy + 5yz + 6zx

If xy + yz + zx = 1 then sum (x + y)/(1 - xy)=

Statement I If tan^(-1) x + tan^(-1) y = pi/4 - tan^(-1) z " and " x + y + z = 1 , then arithmetic mean of odd powers of x, y, z is equal to 1/3 . Statement II For any x, y, z we have xyz - xy - yz - zx + x + y + z = 1 + ( x - 1) ( y - 1) ( z - 1)

Add x^2yz,2yzx^2 and -4zx^2y

Subtract the sum of (x^2-2y^2+xy) and (y^2+z^2+xyz) from the sum of (z^2-2zx-xyz) and (x^2+xy)

If xy=6,yz=10, xz=15, and x gt0 , then xyz=