How do you use equations to drive an equation drive curve if they are too big for the dialogue box?

I am using equations to define the curvature of an airfoil. I realize this can be done by using already calculated coordinates imported into solidworks, However, I wanted to make it as dynamic as possible since I plan on running an analysis of different airfoil shapes. The issue is that the equations used to drive the curve parametrically are too large for the dialogue box of the equation drive curve feature. Any suggestions?

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