Hi I'm Oscar and I'm new on this forum.

I would like to know how does Maple manage Normal random variables when I want to obtain a symbolic expresion like the following (use of Variance to compute symbolically the variance of a combination of normal random variables with its characteristic parameters also symbolically defined)

with(Statistics):

x:=RandomVariable(Normal(Mux,Sigmax)):

y:=RandomVariable(Normal(Muy,Sigmay)):

z:=Variance(x^2+y^2+x*y+c): (1)