How to add calculations to the gnome search bar?

Solution 1:

I found this from Built-in calculator to GNOME search window

The pre-installed GNOME Calculator in Ubuntu 18.04 is a snap application which may lack some features provided by the traditional one due to restrictions of snap packages.

Remove the snap application by running

snap remove gnome-calculator

and install the traditional apt one by running

sudo apt install gnome-calculator

You may need to to restart GNOME shell by hitting Alt+F2, then typing r and pressing Enter for it to take effect.

Solution 2:

It works for me in Ubuntu 17.10 (and Wayland) with double parentheses, which is used also on the command line

$ echo "$((1+2))"
3

So try

((1+2))

See this screenshot,

After an update & upgrade it works without parentheses and with single parentheses too,

1+2
(1+2)

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