Declension table of ?āmanasya

Neuter	Singular	Dual	Plural
Nominative	āmanasyam	āmanasye	āmanasyāni
Vocative	āmanasya	āmanasye	āmanasyāni
Accusative	āmanasyam	āmanasye	āmanasyāni
Instrumental	āmanasyena	āmanasyābhyām	āmanasyaiḥ
Dative	āmanasyāya	āmanasyābhyām	āmanasyebhyaḥ
Ablative	āmanasyāt	āmanasyābhyām	āmanasyebhyaḥ
Genitive	āmanasyasya	āmanasyayoḥ	āmanasyānām
Locative	āmanasye	āmanasyayoḥ	āmanasyeṣu

Compound āmanasya -

Adverb -āmanasyam -āmanasyāt