Perhaps you should try some spelling variations:
"lecture notes of the functions mathematical della" » "lecture notes of the equations mathematical della", "lecture notes of the functions mathematical cell", "lecture notes of the functions mathematical delay", "lecture notes of the functions mathematical data"
"lecture notes of the tra matematiche dalla" » "lecture notes of the tra matematici della", "lecture notes of the tra matematica della", "lecture notes of the tra matematica dalla", "lecture notes of the forme matematiche dalla", "lecture notes of the altra matematica dalla"
"lecture notes of the a matematica nella" » "lecture notes of the a matematica della", "lecture notes of the a matematici della", "lecture notes of the a matematica nel", "lecture notes of the a mathematica nella", "lecture notes of the la matematica nella", "lecture notes of the e matematica nella"

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