Use the stix package in your LaTeX document to create below Plus-minus symbols
\usepackage{stix}
Minus-or-Plus Sign

\mp

\mp
Plus-Minus Sign

\pm

\pm
Plus Sign

+

+
Minus

–

–
Dot Plus

\dotplus

\dotplus
Circled Plus

\oplus

\oplus
Dot Minus

\dotminus

\dotminus
Circled Minus

\ominus

\ominus
Squared Plus

\boxplus

\boxplus
Squared Minus

\boxminus

\boxminus
Double Plus

\doubleplus

\doubleplus
Triple Plus

\tripleplus

\tripleplus
Plus Sign with Small Circle Above

\ringplus

\ringplus
Plus Sign with Circumflex Accent Above

\plushat

\plushat
Plus Sign with Tilde Above

\simplus

\simplus
Plus Sign with Dot Below

\plusdot

\plusdot
Plus Sign with Tilde Below

\plussim

\plussim
Plus Sign with Subscript Two

\plussubtwo

\plussubtwo
Plus Sign with Black Triangle

\plustrif

\plustrif
Minus Sign with Comma Above

\commaminus

\commaminus
Minus Sign with Dot Below

\minusdot

\minusdot
Minus Sign with Falling Dots

\minusfdots

\minusfdots
Minus Sign with Rising Dots

\minusrdots

\minusrdots
Plus Sign In Left Half Circle

\opluslhrim

\opluslhrim
Plus Sign In Right Half Circle

\oplusrhrim

\oplusrhrim
Equals Sign Above Plus Sign

\eqqplus

\eqqplus
Plus Sign Above Equals Sign

\pluseqq

\pluseqq
Plus Sign In Triangle

\triangleplus

\triangleplus
Minus Sign In Triangle

\triangleminus

\triangleminus
N-Ary Circled Plus Operator

\bigoplus

\bigoplus
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