Substituting a variable by a value: ()

6.12.19 Substituting a variable by a value: ()

Another way to substitute a variable by a value, besides with the | operator or the subst command, is with something akin to functional notation. You can follow an expression or expression name with equalities of the form variable = value.

Examples.

Input:
Expr:= x + 2*y + 3*z
then:
subst(Expr,[x=1,y=2])
or:
Expr | x=1, y=2
or:
Expr(x=1,y=2)
Output:
5+3 z
Input:
(h*k*t^2+h^3*t^3)(t=2)
Output:
4 h k+8 h³