An appropriate value for `item-indent` in tasks package

Question

I have three examples of increasing functions that I have listed using the tasks package. A value in the \settasks{} command is item-indent=2cm. I want the left edge of iii.) to be indented 2em from the left margin, though. I set label-width equal to the width of iii.) and I have label-offset=1em. I think that item-indent should be set equal to the sum of 2em, the value for label-width, and label-offset=1em. Is that right? (I used item-indent=3.5cm just to give some indentation. It is not the indentation that I want.)

\documentclass[10pt]{amsart}
\usepackage{amsmath}
\usepackage{array,booktabs}

\newlength\labelwd
\settowidth\labelwd{ iii.)}
\usepackage{tasks}
\settasks{counter-format =tsk[r].), label-offset=1em, label-align=right, label-width
=\labelwd, item-indent=3.5cm, before-skip =\smallskipamount, after-item-skip=0pt}


\begin{document}


The following functions are sums of two increasing functions on the interval $[0, \, \infty)$ and so are increasing functions on $[0, \, \infty)$.
\begin{tasks}(1)
          \task $x^{2} + x$
          \task $x^{3} + 2x^{2} + 3x - 7$
          \task $x^{2} + \sqrt{x}$
\end{tasks}

\end{document}

Answer 1

Like this?

\documentclass[10pt]{amsart}
\usepackage[showframe]{geometry}
\usepackage{amsmath}
\usepackage{array,booktabs}

\setlength\parindent{1em}

\newlength\labelwd
\settowidth\labelwd{iii.)}
\usepackage{tasks}
\settasks{counter-format =tsk[r].), label-offset=1em, label-align=right, label-width
=\labelwd, item-indent=\dimexpr\labelwd+2em +\parindent\relax, before-skip =\smallskipamount, after-item-skip=0pt}
\begin{document}


The following functions are sums of two increasing functions on the interval $[0, \, \infty)$ and so are increasing functions on $[0, \, \infty)$.
\begin{tasks}(1)
          \task $x^{2} + x$
          \task $x^{3} + 2x^{2} + 3x - 7$
          \task $x^{2} + \sqrt{x}$
\end{tasks}

\end{document}