What is the 2nd power of 2007 minus 2008 multiplied by 2006 Second power of 2007-2008*2006

What is the 2nd power of 2007 minus 2008 multiplied by 2006 Second power of 2007-2008*2006

2007^2-2008*2006
=2007^2-(2007+1)(2007-1)
=2007^2-(2007^2-1)
=2007^2-2007^2+1
=1

What is the difference between the 2007 power of -2 and the 2008 power of -2 2007 Power of -2 minus 2008 power of -2

(-2)^2007-(-2)^2008
=(-2)^2007-(-2)*(-2)^2007
=(1+2)*(-2)^2007
=-3*2^2007