Function to extract coeffcient for a given term
Basic solving rational expression exercise
Add answer and fraction simplification
Ensure variables don't cancel
Simplify code
Start improving hints
Add an exercise type showing equation not graph
Add method to evaluate an expression
Spell evaluate correctly
Improve hints
Add function to generate string showing how to evaluate
Improve hints to show how to evaluate each expression
More hints
consistent gender, fix #52147

replace *he* with *she* in the *isMale(0)* section
fix plural in problem text, fix #47643

*isSingular(randRange( 1, 8 ))* and *<var>randRange( 1, 8 )</var> hour/s* are different numbers. i added a new variable *sleddingHours* and use it as *<var>sleddingHours</var> <var>plural("hour", sleddingHours)</var>*
correct bracketing, fix #47007

fix wrong bracketing.
avoiding rounding problem, fix #46111 and #49683

calculate with fraction like the hint instead of decimals.
39.9/12*60=199.49999999999997 is now 133/40*60=199.5
102.66666666666666/32*60=192.49999999999997 is now 77/24*60=192.5
Merge pull request #52269 from mauk81/patch-4

correct bracketing, fix #47007
fix wording in geometry_proofs_intro
Merge pull request #52149 from mauk81/patch-1

consistent gender, fix #52147