Declension table of ?matsyatantra

Neuter	Singular	Dual	Plural
Nominative	matsyatantram	matsyatantre	matsyatantrāṇi
Vocative	matsyatantra	matsyatantre	matsyatantrāṇi
Accusative	matsyatantram	matsyatantre	matsyatantrāṇi
Instrumental	matsyatantreṇa	matsyatantrābhyām	matsyatantraiḥ
Dative	matsyatantrāya	matsyatantrābhyām	matsyatantrebhyaḥ
Ablative	matsyatantrāt	matsyatantrābhyām	matsyatantrebhyaḥ
Genitive	matsyatantrasya	matsyatantrayoḥ	matsyatantrāṇām
Locative	matsyatantre	matsyatantrayoḥ	matsyatantreṣu

Compound matsyatantra -

Adverb -matsyatantram -matsyatantrāt