Given x power of 9 of 8 x y power of 10 of 9 x 16 of 15=2, find the value of x, y, z?

Left =(9^x*10^y*16^z)/(8^x*9^y*15^z)
=3^(2X-2y-z)*(2^y+4z-3x)*5^(y-z)
=2^1
So
2X-2y-z=0
Y-4z-3 x=1
Y-z=0
X=-1/5, y=-2/15, z=-2/15

-2Y of the third power +(2x of the third power-xyz)-2(x of the third power-y of the third power +xyz), where x=1, y=2, x=-3

Original formula=-2y3+2x3-xyz-2x3+2y3-2xyz
=-3Xyz
When x=1, y=2, z=-3
Original formula=-3×1×2×(-3)=18

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