In other words, a system of three variables would have to be tested once with one test equation with the terms α α , β β , γ γ being terms 1 , 2 , 3 in the constraint equation (in any order), but to test a system of four variables the test would have to be performed up to four times with four different test equations, with the terms α α , β β , γ γ being terms 1 , 2 , 3 , 1 , 2 , 4 , 1 , 3 , 4 , and 2 , 3 , 4 in the constraint equation (each in any order) in four different tests. For a system of five variables, ten tests would have to be performed on a holonomic system to verify that fact, and for a system of five variables with three sets of constraint equations, thirty tests (assuming a simplification like a change-of-variable could not be performed to reduce that number). For this reason, it is advisable when using this method on systems of more than three variables to use common sense as to whether the system in question is holonomic, and only pursue testing if the system likely is not. Additionally, it is likewise best to use mathematical intuition to try to predict which test would fail first and begin with that one, skipping tests at first that seem likely to succeed.