Declension table of gurudattamantra

Neuter	Singular	Dual	Plural
Nominative	gurudattamantram	gurudattamantre	gurudattamantrāṇi
Vocative	gurudattamantra	gurudattamantre	gurudattamantrāṇi
Accusative	gurudattamantram	gurudattamantre	gurudattamantrāṇi
Instrumental	gurudattamantreṇa	gurudattamantrābhyām	gurudattamantraiḥ
Dative	gurudattamantrāya	gurudattamantrābhyām	gurudattamantrebhyaḥ
Ablative	gurudattamantrāt	gurudattamantrābhyām	gurudattamantrebhyaḥ
Genitive	gurudattamantrasya	gurudattamantrayoḥ	gurudattamantrāṇām
Locative	gurudattamantre	gurudattamantrayoḥ	gurudattamantreṣu

Compound gurudattamantra -

Adverb -gurudattamantram -gurudattamantrāt