||+

#vertical bars #lines plus #parallel lines plus #ll plus

ll+

#text representation #ll plus #letters plus

⏫⏫➕

#double increase #level level plus #fast up plus #two ls plus #ll plus

🔗🔗➕

#linked list plus #chain plus #computer science ll #ll plus

1️⃣1️⃣➕

#one one plus #eleven plus #numbers literal #visual ll #ll plus