In computation, we usually think in terms of numerical computation where the result is a numerical constant. However, there are systems that provide symbolic computation.
(a) First illustration:
- Numerical computation:
![[Graphics:Images/index_gr_1.gif]](Images/index_gr_1.gif)
- Symbolic computation:
![[Graphics:Images/index_gr_3.gif]](Images/index_gr_3.gif)
(b) Second illustration:
![[Graphics:Images/index_gr_5.gif]](Images/index_gr_5.gif)
(c) Third illustration using Mathematica's Together function:
![[Graphics:Images/index_gr_7.gif]](Images/index_gr_7.gif)
![[Graphics:Images/index_gr_9.gif]](Images/index_gr_9.gif)
(d) Fourth illustration - Mathematica's Solve function - e1 is numerical, e2 is symbolic
![[Graphics:Images/index_gr_11.gif]](Images/index_gr_11.gif)
![[Graphics:Images/index_gr_13.gif]](Images/index_gr_13.gif)