Question 309022
Text form: f*(x)=x^2+5*x+1 simplifies to f*x-x^2-5*x-1=0

Remove unneeded parentheses around factor x

It becomes f*x=x^2+5*x+1

look at:  x^2+5*x+1

Moved these terms to the left and change to -

it becomes:  f*x-x^2-5*x-1