libqwtmathml-qt5-6 6.1.3-1 (i386 binary) in ubuntu bionic

 The Qwt library contains Qt GUI Components and utility classes which
 are primarily useful for programs with a technical background. Most of
 these widgets are used to control or display values, arrays, or ranges
 of type double.
 .
 This package contains a text engine for the MathML renderer of the Qt
 solution package for the Qwt library and Qt5.