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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def settings(request):
 """inject few waliki's settings to the context to be used in templates"""

    from waliki.settings import WALIKI_USE_MATHJAX      # NOQA
    return {k: v for (k, v) in locals().items() if k.startswith('WALIKI')}