f(x) = x + 1 / x
p_1: y = x
h: x = 0
p(x) = x^(2) - 1 + 1 / (x + 1)
p_2(x) = x^(2) - 1
i: x = -1
Text1: "" + (LaTeX[f]) + ""
Text2: "" + (LaTeX[p]) + ""