This will be the code according to answer ...
1. T= x
2. T = T * T [$x^{2}$]
3. T = T + 4 [$x^{2}$ + 4 ]
4. T = T *x [$x^{3} + 4x$]
5. T = T * x [$x^{4} + 4x^{2}$]
6. T = T + 6 [$x^{4} + 4x^{2}+ 6$]
7. T = T * x [$x^{5} + 4x^{3}+ 6x$]
8. T = T + 5 [ $x^{5} + 4x^{3}+ 6x +5$ ]
No of operation = 7
We hav to evaluate that expression using single temporary variable .....