diff --git a/doc/src/Eqs/bond_class2.jpg b/doc/src/Eqs/bond_class2.jpg
deleted file mode 100644
index 493048100e..0000000000
Binary files a/doc/src/Eqs/bond_class2.jpg and /dev/null differ
diff --git a/doc/src/Eqs/bond_class2.tex b/doc/src/Eqs/bond_class2.tex
deleted file mode 100644
index 0735b61025..0000000000
--- a/doc/src/Eqs/bond_class2.tex
+++ /dev/null
@@ -1,9 +0,0 @@
-\documentclass[12pt]{article}
-
-\begin{document}
-
-$$
-   E = K_2 (r - r_0)^2 + K_3 (r - r_0)^3 + K_4 (r - r_0)^4 
-$$
-
-\end{document}
\ No newline at end of file
diff --git a/doc/src/bond_class2.rst b/doc/src/bond_class2.rst
index 9a7987fa39..e3098ef6dc 100644
--- a/doc/src/bond_class2.rst
+++ b/doc/src/bond_class2.rst
@@ -1,19 +1,19 @@
-.. index:: bond\_style class2
+.. index:: bond_style class2
 
-bond\_style class2 command
-==========================
+bond_style class2 command
+=========================
 
-bond\_style class2/omp command
-==============================
-
-bond\_style class2/kk command
+bond_style class2/omp command
 =============================
 
+bond_style class2/kk command
+============================
+
 Syntax
 """"""
 
 
-.. parsed-literal::
+.. code-block:: LAMMPS
 
    bond_style class2
 
@@ -21,7 +21,7 @@ Examples
 """"""""
 
 
-.. parsed-literal::
+.. code-block:: LAMMPS
 
    bond_style class2
    bond_coeff 1 1.0 100.0 80.0 80.0
@@ -31,10 +31,12 @@ Description
 
 The *class2* bond style uses the potential
 
-.. image:: Eqs/bond_class2.jpg
-   :align: center
+.. math::
 
-where r0 is the equilibrium bond distance.
+   E = K_2 (r - r_0)^2 + K_3 (r - r_0)^3 + K_4 (r - r_0)^4
+
+
+where :math:`r_0` is the equilibrium bond distance.
 
 See :ref:`(Sun) <bond-Sun>` for a description of the COMPASS class2 force field.
 
@@ -43,10 +45,10 @@ The following coefficients must be defined for each bond type via the
 the data file or restart files read by the :doc:`read\_data <read_data>`
 or :doc:`read\_restart <read_restart>` commands:
 
-* R0 (distance)
-* K2 (energy/distance\^2)
-* K3 (energy/distance\^3)
-* K4 (energy/distance\^4)
+* :math:`r_0` (distance)
+* :math:`K_2` (energy/distance\^2)
+* :math:`K_3` (energy/distance\^3)
+* :math:`K_4` (energy/distance\^4)
 
 
 ----------
@@ -98,8 +100,3 @@ Related commands
 
 
 **(Sun)** Sun, J Phys Chem B 102, 7338-7364 (1998).
-
-
-.. _lws: http://lammps.sandia.gov
-.. _ld: Manual.html
-.. _lc: Commands_all.html
diff --git a/doc/txt/bond_class2.txt b/doc/txt/bond_class2.txt
deleted file mode 100644
index 4390e3613c..0000000000
--- a/doc/txt/bond_class2.txt
+++ /dev/null
@@ -1,81 +0,0 @@
-"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
-
-:link(lws,http://lammps.sandia.gov)
-:link(ld,Manual.html)
-:link(lc,Commands_all.html)
-
-:line
-
-bond_style class2 command :h3
-bond_style class2/omp command :h3
-bond_style class2/kk command :h3
-
-[Syntax:]
-
-bond_style class2 :pre
-
-[Examples:]
-
-bond_style class2
-bond_coeff 1 1.0 100.0 80.0 80.0 :pre
-
-[Description:]
-
-The {class2} bond style uses the potential
-
-:c,image(Eqs/bond_class2.jpg)
-
-where r0 is the equilibrium bond distance.
-
-See "(Sun)"_#bond-Sun for a description of the COMPASS class2 force field.
-
-The following coefficients must be defined for each bond type via the
-"bond_coeff"_bond_coeff.html command as in the example above, or in
-the data file or restart files read by the "read_data"_read_data.html
-or "read_restart"_read_restart.html commands:
-
-R0 (distance)
-K2 (energy/distance^2)
-K3 (energy/distance^3)
-K4 (energy/distance^4) :ul
-
-:line
-
-Styles with a {gpu}, {intel}, {kk}, {omp}, or {opt} suffix are
-functionally the same as the corresponding style without the suffix.
-They have been optimized to run faster, depending on your available
-hardware, as discussed on the "Speed packages"_Speed_packages.html doc
-page.  The accelerated styles take the same arguments and should
-produce the same results, except for round-off and precision issues.
-
-These accelerated styles are part of the GPU, USER-INTEL, KOKKOS,
-USER-OMP and OPT packages, respectively.  They are only enabled if
-LAMMPS was built with those packages.  See the "Build
-package"_Build_package.html doc page for more info.
-
-You can specify the accelerated styles explicitly in your input script
-by including their suffix, or you can use the "-suffix command-line
-switch"_Run_options.html when you invoke LAMMPS, or you can use the
-"suffix"_suffix.html command in your input script.
-
-See the "Speed packages"_Speed_packages.html doc page for more
-instructions on how to use the accelerated styles effectively.
-
-:line
-
-[Restrictions:]
-
-This bond style can only be used if LAMMPS was built with the CLASS2
-package.  See the "Build package"_Build_package.html doc page for more
-info.
-
-[Related commands:]
-
-"bond_coeff"_bond_coeff.html, "delete_bonds"_delete_bonds.html
-
-[Default:] none
-
-:line
-
-:link(bond-Sun)
-[(Sun)] Sun, J Phys Chem B 102, 7338-7364 (1998).