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I haven't taken a math class in 30 years, but 30 yrs ago, I took a lot of them. Even so, the algebra problems your kid is doing hasn't changed much since the 17th century.
Find the earliest reference in the book, or perhaps even inside the cover. I strongly suspect the author has minted his own notation. In context, it looks like you're supposed to replace the squiggly with another standard symbol, such as < etc.
Start with the book sections you child is covering.
Use the contextual clues from the types of problems being solved.
(This would be the Chapter topic, and the section topics, and problem heading (solve for x))
Start there with a broad scan.
At the very top of the site is a search. I usually can find anything a student is working on.
Also helps to know know what level of algebra.
Finally, in most math books these days, even the ONLINE versions, the symbols are introduced in the sections the kids never read at the front of the section. Usually as an EXAMPLE problem!
How old is your kid?
If he/she is primary school pupil then the sign is just a incorrectly rendered multiplication sign.
There is absolutely nothing else you can do with c ^ (12/5) and c ^ (3/5) but to multiply them.
And solutions are
13) c ^ 3
14) x ^ (21/4) (unless part of formula is missing on right)
Or the question was just for laughs ...
If you know the name of the book and the page number, then you might be able to find an errata. Most printed text books have pages and pages of errata.
If they do not let you bring the books home, then there is probably an online version with some lame password like schooldistrictname2015. Hopefully, the online version would be fixed but you might still need to find an errata.
It will if the cost of Xamarin comes down to a reasonable level as a result - which I'd imagine it could. That could really boost usage of .NET (ish) into the mobile market which presumably is why MS are buying them in the first place. Either that or to crush them utterly - difficult to tell with MS sometimes...
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...