Declension table of ?brahmatantra

Neuter	Singular	Dual	Plural
Nominative	brahmatantram	brahmatantre	brahmatantrāṇi
Vocative	brahmatantra	brahmatantre	brahmatantrāṇi
Accusative	brahmatantram	brahmatantre	brahmatantrāṇi
Instrumental	brahmatantreṇa	brahmatantrābhyām	brahmatantraiḥ
Dative	brahmatantrāya	brahmatantrābhyām	brahmatantrebhyaḥ
Ablative	brahmatantrāt	brahmatantrābhyām	brahmatantrebhyaḥ
Genitive	brahmatantrasya	brahmatantrayoḥ	brahmatantrāṇām
Locative	brahmatantre	brahmatantrayoḥ	brahmatantreṣu

Compound brahmatantra -

Adverb -brahmatantram -brahmatantrāt