Find matching terms of original and simplified binomic formulas in two lists.
Two lists of terms are given. One list shows a series of binomic formulas. In the other list, the expanded and simplified (where like terms have been combined) terms for these formulas are given in a random order.
The task is to find the matching pairs in these lists.
The summands of the formula's factors will either be a variable and a literal number or both of them will be variables. In no case, both summands will be numbers, which means the expanded term will always contain variables and it does not simplify to a single literal number.
The number of problems is selectable. For the types of formulas that will appear it can be specified that only some of the three binomic formulas will be used.
Variables that appear will always be named a and b or x and y.
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