Declension table of ?smṛtiśāstra

Neuter	Singular	Dual	Plural
Nominative	smṛtiśāstram	smṛtiśāstre	smṛtiśāstrāṇi
Vocative	smṛtiśāstra	smṛtiśāstre	smṛtiśāstrāṇi
Accusative	smṛtiśāstram	smṛtiśāstre	smṛtiśāstrāṇi
Instrumental	smṛtiśāstreṇa	smṛtiśāstrābhyām	smṛtiśāstraiḥ
Dative	smṛtiśāstrāya	smṛtiśāstrābhyām	smṛtiśāstrebhyaḥ
Ablative	smṛtiśāstrāt	smṛtiśāstrābhyām	smṛtiśāstrebhyaḥ
Genitive	smṛtiśāstrasya	smṛtiśāstrayoḥ	smṛtiśāstrāṇām
Locative	smṛtiśāstre	smṛtiśāstrayoḥ	smṛtiśāstreṣu

Compound smṛtiśāstra -

Adverb -smṛtiśāstram -smṛtiśāstrāt