{"result":{"text":"f left parenthesis x right parenthesis equals 2 x cubed minus 15 x squared plus 36 x plus k\nf apostrophe left parenthesis x right parenthesis equals 6 open parentheses x squared minus 5 x plus 6 close parentheses equals 6 left parenthesis x minus 2 right parenthesis left parenthesis x minus 3 right parenthesis\nrightwards double arrow f apostrophe left parenthesis x right parenthesis equals 0 space space space space f o r space space space x equals 2 comma space 3"},"status":"ok"}