Enable text based alternatives for graph display and drawing entry

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Use the table below to find:


`(f\circg)(15)` = `(g\circf)(14)` =
`(f\circf)(-10) = ``(g\circg)(12) = `
x-10-4-31112131415
`f(x)`111413-312-415-10
`g(x)`14-411-10-3131512

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