Declension table of ?prayogamantra

Masculine	Singular	Dual	Plural
Nominative	prayogamantraḥ	prayogamantrau	prayogamantrāḥ
Vocative	prayogamantra	prayogamantrau	prayogamantrāḥ
Accusative	prayogamantram	prayogamantrau	prayogamantrān
Instrumental	prayogamantreṇa	prayogamantrābhyām	prayogamantraiḥ prayogamantrebhiḥ
Dative	prayogamantrāya	prayogamantrābhyām	prayogamantrebhyaḥ
Ablative	prayogamantrāt	prayogamantrābhyām	prayogamantrebhyaḥ
Genitive	prayogamantrasya	prayogamantrayoḥ	prayogamantrāṇām
Locative	prayogamantre	prayogamantrayoḥ	prayogamantreṣu

Compound prayogamantra -

Adverb -prayogamantram -prayogamantrāt