I now have a Texas calculator on my desk.
Meanwhile, my linux box has a dedicated macro to opening and closing SpeedCrunch, I also have br from the command line. Along with a numberpad input, there is literally no difference here from a desk calculator (which I still have, of course)
The Windows 7 calculator is a solid basic calculator, but I think most power users in that time used third-party options or something like a spreadsheet. Microsoft clearly thinks of the calculator as a demo application for UWP and XAML, as evidenced by them open-sourcing it, sort of like how Apple treats TextEdit like a Cocoa text rendering demo. If you want a serious calculator or a serious text editor, you're better off looking outside these bundled tools.
Can't live without that one in $PATH.
from numpy import *
from numpy import array as c
from math import *
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt