BhG 13.29

syntax

yaḥ (he who) prakṛtyā eva (just by the nature) karmāṇi (activities) sarvaśaḥ (in every respect) kriyamāṇāni (which are being done),
tathā ca (and also) ātmānam akartāram (the non-active self) paśyati (he sees),
saḥ (he) paśyati (he sees).

grammar

prakṛtyā	–	prakṛti 3n.1 f. – by nature, primary substance, original cause (from: pra-√kṛ – to produce);
eva	–	av. – certainly, just, merely;
ca	–	av. – and;
karmāṇi	–	karman 1n.3 n. – activities (from: √kṛ – to do);
kriyamāṇāni	–	kriyamāṇa (√kṛ – to do) pass. PPr 1n.3 n. – which are being done;
sarvaśaḥ	–	av. – completely, entirely, altogether, on all sides (from: sarva – all, whole);
yaḥ	–	yat sn. 1n.1 m. – he who;
paśyati	–	√dṛś (to see) Praes. P 1v.1 – he sees;
tathā	–	av. – in that manner, so, in like manner;
ātmānam	–	ātman 2n.1 m. – self;
akartāram	–	a-kartṛ 2n.1 m. – non-doer, non-active (from: √kṛ – to do);
saḥ	–	tat sn. 1n.1 m. – he;
paśyati	–	√dṛś (to see) Praes. P 1v.1 – he sees;

textual variants

ca → hi (indeed);
tathātmānam → sadātmānam / tadātmānam (always the self / then the self);

The first and second pada of verse 13.29 are almost the same as the first and second pada of verse BhG 3.27;

Śāṃkara

sarva-bhūta-stham īśvaraṃ samaṃ paśyan na hinasty ātmanātmānaṃ [gītā 13.28] ity uktam | tad anupapannaṃ sva-guṇa-karma-vailakṣaṇya-bheda-bhinneṣv ātmasu, ity etad āśaṅkyāha—
prakṛtyā prakṛtir bhagavato māyā triguṇātmikā | māyāṃ tu prakṛtiṃ vidyād [śāstrvetuttaṃ 4.10] iti mantra-varṇāt | tayā prakṛtyaiva ca nānyena mahad-ādi-kārya-kāraṇākāra-pariṇatayā karmāṇi vāṅ-manaḥ-kāyārabhyāṇi kriyamāṇāni nirvartyamānāni sarvaśaḥ sarva-prakārair yaḥ paśyaty upalabhate, tathātmānaṃ kṣetrajñam akartāraṃ sarvopādhi-vivarjitaṃ sa paśyati, sa paramārtha-darśīty abhiprāyaḥ | nirguṇasyākartur nirviśeṣasyākāśasyeva bhede pramāṇānupapattir ity arthaḥ

Rāmānuja

sarvāṇi karmāṇi, „kāryakāraṇakartṛtve hetuḥ prakṛtir ucyate” iti pūrvoktarītyā prakṛtyā kriyamāṇānīti yaḥ paśyati, tathā ātmānaṃ jñānākāraṃ akartāraṃ ca yaḥ paśyati, tasya prakṛtisaṃyogas tadadhiṣṭhānaṃ tajjanyasukhaduḥkhānubhavaś ca karmarūpājñānakṛtānīti ca yaḥ paśyati, sa ātmānaṃ yathāvad avasthitaṃ paśyati

Śrīdhara

nanu śubhāśubha-karma-kartṛtvena vaiṣamye dṛśyamāne katham ātmanaḥ samatvam ity āśaṅkyāha prakṛtyaiveti | prakṛtyaiva dehendriyākāreṇa pariṇatayā | sarvaśaḥ prakāraiḥ | kriyamāṇāni karmāṇi yaḥ paśyati | tathātmānaṃ cākartāraṃ dehābhimānenaiva ātmanaḥ kartṛtvaṃ na svataḥ | ity evaṃ yaḥ paśyati sa eva samyak paśyati | nānya ity arthaḥ

Madhusūdana

nanu śubhāśubha-karma-kartāraḥ pratidehaṃ bhinnā ātmano viṣamāś ca tat-tad-vicitra-phala-bhoktṛtveneti kathaṃ sarva-bhūta-stham ekam ātmānaṃ samaṃ paśyan na hinasty ātmanātmānam ity uktam ata āha prakṛtyaiveti | karmāṇi vāṅ-manaḥ-kāyārabhyāṇi sarvaśaḥ sarvaiḥ prakāraiḥ prakṛtyaiva dehendriya-saṅghātākāra-pariṇatayā sarva-vikāra-kāraṇa-bhūtayā triguṇātmikayā bhagavan-māyayaiva kriyamāṇāni na tu puruṣeṇa sarva-vikāra-śūnyena yo vivekī paśyati, evaṃ kṣetreṇa kriyamāṇeṣv api karmasu ātmānaṃ kṣetrajñam akartāraṃ sarvopādhi-vivarjitam asaṅgam ekaṃ sarvatra samaṃ yaḥ paśyati, tathā-śabdaḥ paśyatīti-kriyā-karṣaṇārthaḥ, sa paśyati sa paramārtha-darśīti pūrvavat | sa-vikārasya kṣetrasya tat-tad-vicitra-karma-kartṛtvena prati-dehaṃ bhede ‚pi vaiṣamye ‚pi na nirviśeṣasyākartur ākāśasyeva na bhede pramāṇaṃ kiṃcid ātmana ity upapāditaṃ prāk

Viśvanātha

prakṛtyaiva dehendriyādyākāreṇa pariṇatayā sarvaśaḥ sarvāṇy ātmānaṃ jīvaṃ dehābhimānenaiva ātmanaḥ kartṛtvam, na tu svataḥ | ity evaṃ yaḥ paśyatīty arthaḥ

Baladeva

prakṛteḥ sva-vivekaṃ kathaṃ yātīty apekṣāyāṃ tatra prakāram āha – prakṛtyaiveti dvābhyām | yaḥ sarvāṇi karmāṇi prakṛtyaiva cān mad-adhiṣṭhitayeśvara-preritayā kriyamāṇāni paśyati, tathātmānaṃ teṣāṃ karmaṇām akartāraṃ paśyati, sa eva paśyati sva-yāthāṭmya-darśī bhavati | ayam arthaḥ na khalu vijñānānanda-svabhāvo ‚haṃ yuddha-yajñādīni duḥkha-mayāni karmāṇi karomi, kintv anādibhogavāsanenāvivekinā mayādhiṣṭhitā mad-bhoga-siddhaye mad-dehādi-dvārā tāni karotīti tad-dhetukatvāt saiva tat-kartṛīti karam-kāriṇyāḥ prakṛtes tad-akartā śuddho jīvo viviktaḥ | śuddhasyāpi kartṛtvaṃ tu paśyatīty anena vyaktam iti