Question: Declare generic function ...f(x,y,z,t) etc....


when using Maple to do simple calculus I usually have to explicitly
state the dependence of each variable in the expression....for example


is there a way to declare generic functions of a dependent variable

x1 = x1(t) or x2 = x2(x,y,z)

and avoid having to do it repeatedly in an expression?  I know i can use subs to replace patterns, but can you declare somthing like f(x,y,z,t) without giving the details?

Thank you

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