PaXD0Expand is an option for PaXEvaluate.
If set to True, Package-X function D0Expand
will be applied to the output of Package-X.
D0[0, 0, 0, 0, s, t, m^2, m^2, m^2, m^2]
PaXEvaluate[%]\text{D}_0\left(0,0,0,0,s,t,m^2,m^2,m^2,m^2\right)
\text{D}_0\left(0,0,0,0,s,t,m^2,m^2,m^2,m^2\right)
The full result is a ConditionalExpression
D0[0, 0, 0, 0, s, t, m^2, m^2, m^2, m^2]
res = PaXEvaluate[%, PaXC0Expand -> True];\text{D}_0\left(0,0,0,0,s,t,m^2,m^2,m^2,m^2\right)
res // Short
res // Last\text{D}_0\left(0,0,0,0,s,t,m^2,m^2,m^2,m^2\right)
m^2
Use Normal to get the actual expression
(res // Normal)\text{D}_0\left(0,0,0,0,s,t,m^2,m^2,m^2,m^2\right)