1. 
Introduction to Java Programming, Java Multiple-choice questions
liveexample-ppe.pearsoncmg.com/selftest/selftest11e?chapter=2&username=liang11e
2.
A number is increased by 20% and then decreased by 20… – Quora
www.quora.com/A-number-is-increased-by-20-and-then-decreased-by-20-What-is-the-net-increase-or-decrease-percent?share=1
3. 
When 0. 5(20x – 50y + 36) – 0. 25(-100x + 40y – 12) is… – Brainly.com
brainly.com/question/27058711
4. 
Python for Data Science, AI & Development Final Exam Quiz Answers
niyander.blogspot.com/2021/06/Python for Data Science AI Development Final Exam Quiz Answers.html
5.
Percentage Calculator
www.calculator.net/percent-calculator.html
6.
Equivalent Fractions Calculator
www.calculatorsoup.com/calculators/math/fractionsequivalent.php
7. 
Calculate Field expressions—ArcGIS Pro | Documentation
pro.arcgis.com/en/pro-app/latest/tool-reference/big-data-analytics/calculate-field-expressions.htm
8.
Operators and Expressions in Python – Real Python
realpython.com/python-operators-expressions/
9. 
Python range() Function Explained with Examples
pynative.com/python-range-function/
10.
Fraction to percent conversion calculator
www.rapidtables.com/convert/number/fraction-to-percent.html
11.
sql – When to use Common Table Expression (CTE) – Stack Overflow
stackoverflow.com/questions/4740748/when-to-use-common-table-expression-cte
Conclusion
Guide above should be useful for What Is The Result Of The Expression =50+20/10*5?.