{y+x*z}[1;2;3]
{[a;b;c]a+b*c}[1;2;3]
function A1(x, y) {return x*y + x; }
function A2(y, x) {return y*x + y; }
A1 = y~ * x + y
A1 = y * ~x + y
A1 = y * x + y~
function(x) {return x; }
x
A1 = x * y + x
A2 = y * x + x
A1(1, 2), A2(1, 2) A1 = x~ * y + x
It results in
It seems like you can define variables with the name 'x', but when you do not have explicit parameters, then the identifier 'x' is used to refer to the first implicit parameter, y - for second and z - for the third parameter. In context of implicit parameters x, y and z acts like predefined keywords.