1<function-of-x> 2<term><coeff>1</coeff><x/><power>3</power></term> 3<term><coeff>2</coeff><x/><power>2</power></term> 4<term><coeff>3</coeff><x/><power>1</power></term> 5<term><coeff>4</coeff><x/><power>0</power></term> 6</function-of-x> 7