Learn French: Ils sortent souvent avec leurs appareils photo.

sortent is the ils / elles (they) form of the irregular verb sortir (to go out). Unlike regular -ir verbs, it doesn't add an -iss- in the plural forms. Instead, you just drop the -ir and add the endings -ons, -ez, or -ent.

Do I pronounce the -ent at the end of sortent?

No! In French, the -ent ending on a conjugated verb for ils or elles is always completely silent. You just pronounce the base of the word, so sortent sounds exactly like sort.

Why is souvent placed after the verb?

In French, short adverbs like souvent (often) usually go directly after the conjugated verb. While in English you say 'They often go out', in French the word order is 'They go out often' (Ils sortent souvent).

Why does leurs have an 's' at the end?

Leurs means 'their'. In French, possessive words must match the noun they are attached to. Because appareils (cameras) is plural, you must add an 's' to make the plural form leurs instead of using the singular leur.