Report problems with CAS and its interface.

[compsystems]

The following input statement is interpreted as everything to the left of the operator | is the input expression and everything to the right is the substitutions

a*x^2+b*x+c | a=-6,b=-4,c=2 [Enter] -6*x^2-4*x+2 ok

with curved parentheses should be enough

a*x^2+b*x+c | (a=-6,b=-4,c=2) [Enter] -6*x^2-4*x+2 ok

or

(a*x^2+b*x+c) | (a=-6,b=-4,c=2) [Enter] -6*x^2-4*x+2 ok