Possible to limit variable on denominator

[JacobZhao]

for example
X = np.random.randn(1000, 3) y = a * X[:, 0] + b* X[:, 1] + X[:, 2]**2
where the binary_operators=["*", "+", "-", "/"]
is it possible to limit the X[:, 0] not on the denominator

[MilesCranmer]

Have you tried a template expression? Then you could not give it / as an operator, and say exactly which feature goes where https://ai.damtp.cam.ac.uk/pysr/examples/#template-expressions