4m^2×4m^3. how do i put this as a single power

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Me find the value of x each figure.

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.