Chapter 8: Problem 2
Expand the brackets of the following expressions: (a) \(\left(e^{x}+2\right)^{2}\) (b) \(\left(\mathrm{e}^{x}+1\right)\left(\mathrm{e}^{-x}-1\right)\) (c) \(\left(\mathrm{e}^{2 x}+\mathrm{e}^{x}\right)\left(\mathrm{e}^{-2 x}+\mathrm{e}^{-x}\right)\) (d) \(\left(1+\mathrm{e}^{2 x}+\mathrm{e}^{-2 x}\right)\left(1-\mathrm{e}^{x}\right)\)