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Sometimes called dyscalculia , a math disability involves difficulties such as learning math concepts ( such as quantity , place value , and time ) , difficulty memorizing math facts , difficulty organizing numbers , and understanding how problems are organized on the page .
 dyscalculia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 dyscalculia