WPS-Office equation editor

For the first issue you need a set of fonts for WPS and this should be dropped into the /usr/share/fonts folder for system wide access.

Now I have created a git repo with these fonts download it from here and add it like this:

1. download fonts from here
2. create a folder sudo mkdir /usr/share/fonts/kingsoft
3. copy the contents of that download to folder in (2)
4. run sudo chown -R $USER:$USER /usr/share/fonts/kingsoft
5. run sudo chmod -R o+rw,g+rw /usr/share/fonts/kingsoft or leave as is if it has read and write permissions for owner (you)
6. run sudo fc-cache -vfs

For the second issue. You could try this qalculate:

Install: sudo apt-get install qalculate

Qalculator resource: https://www.maketecheasier.com/qalculate-powerful-calculator-for-linux/

I just downloaded the fonts and copy them into /usr/share/fonts/wps-office/

It worked for me!

The steps were:

1. Download the fonts as a zip file: https://github.com/udoyen/wps-fonts
2. Unzip the file wps-fonts-master.zip
3. Move the .ttf files to /usr/share/fonts/wps-office/ (sudo mv ~/Downloads/wps-fonts-master/* /usr/share/fonts/wps-office/)
4. Restart WPS Office (If it's running)

Following the steps that is in WPS Office Equation repository on Github.

1. Create and access a temporal directory.

   $ mkdir tmp
   $ cd tmp
   

2. Clone the Git repository.

   $ git clone https://github.com/iamdh4/ttf-wps-fonts.git
   

3. Enter the directory cloned

   $ cd ttf-wps-fonts
   

4. Run the install script

   $ sudo bash install.sh
   

5. Delete the temporal directory

   $ rm -rf /tmp/ttf-wps-fonts
   

I tried it in WPS 10.1.0.5707 on Linux Mint 19 (based on Ubuntu 18.04).