This video explains several approaches to numerically solve ordinary differential equations in PTC Mathcad Prime. The video shows the "odesolve" function in a Solve Block to solve a first order ODE, to solve a second order spring mass system, and to solve a coupled pair of differential equations (Lotka-Volterra equations). Note that PTC Mathcad Prime 9 added an additional method to solve ODEs: the ability to solve ODEs symbolically, which does not involve "odesolve": • Symbolic Engine Updates | Mathcad Prime 9 Try out the latest version of PTC Mathcad Prime by downloading the free trial at https://www.mathcad.com/trial 00:00 1st order ODE Solve Block 02:10 2nd order spring mass system 04:57 Coupled 1st order system