Perhaps you should try some spelling variations:
"interdisciplinary pedagogies mathematics" » "interdisciplinary economies mathematics", "interdisciplinary methodologies mathematics", "interdisciplinary technologies mathematics", "interdisciplinary pedagogical mathematics", "interdisciplinary pedagogy mathematics", "interdisciplinary categories mathematics"
"interdisciplinary analyses mathematics" » "interdisciplinary analysis mathematics", "interdisciplinary dialogues mathematics", "interdisciplinary case mathematics", "interdisciplinary analysis mathematical", "interdisciplinary analysis mathematik"
"interdisciplinary advances mathematics" » "interdisciplinary sciences mathematics", "interdisciplinary science mathematics", "interdisciplinary aspects mathematics", "interdisciplinary advanced mathematics", "interdisciplinary advanced mathematical", "interdisciplinary advancing mathematics"

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