Declension table of ?bṛhannirvāṇatantra

Neuter	Singular	Dual	Plural
Nominative	bṛhannirvāṇatantram	bṛhannirvāṇatantre	bṛhannirvāṇatantrāṇi
Vocative	bṛhannirvāṇatantra	bṛhannirvāṇatantre	bṛhannirvāṇatantrāṇi
Accusative	bṛhannirvāṇatantram	bṛhannirvāṇatantre	bṛhannirvāṇatantrāṇi
Instrumental	bṛhannirvāṇatantreṇa	bṛhannirvāṇatantrābhyām	bṛhannirvāṇatantraiḥ
Dative	bṛhannirvāṇatantrāya	bṛhannirvāṇatantrābhyām	bṛhannirvāṇatantrebhyaḥ
Ablative	bṛhannirvāṇatantrāt	bṛhannirvāṇatantrābhyām	bṛhannirvāṇatantrebhyaḥ
Genitive	bṛhannirvāṇatantrasya	bṛhannirvāṇatantrayoḥ	bṛhannirvāṇatantrāṇām
Locative	bṛhannirvāṇatantre	bṛhannirvāṇatantrayoḥ	bṛhannirvāṇatantreṣu

Compound bṛhannirvāṇatantra -

Adverb -bṛhannirvāṇatantram -bṛhannirvāṇatantrāt