Expression 1: "A" equals left bracket, negative 20 , negative 19 , ... , 20 , right bracket equals a list of numbers. 41 itemsA=−20,−19,...,20
equals=
negative 20−20
negative 19−19
negative 18−18
negative 17−17
negative 16−16
negative 15−15
negative 14−14
negative 13−13
negative 12−12
negative 11−11
negative 10−10
negative 9−9
negative 8−8
negative 7−7
negative 6−6
41 element list
1
Expression 2: StartFraction, 1 Over 20 , EndFraction left parenthesis, left parenthesis, "x" minus "A" , right parenthesis squared plus "A" squared , right parenthesis Has graph. To audio trace, press ALT+T.120x−A2+A2
