here i will do an example thing:
i claim brazil. 201 tokens.
i want french guiana, 1 token. i spend 10 tokens and french guiana is eliminated, it becomes part of brazil. i have 191 tokens left still. i give venezuela 32 tokens, they have 31 tokens. since it is more than their population, they automatically accept. i now have 159 tokens left, and venezuela as my ally. i decide to make bolivia my ally. i give them 12 tokens, they have 11 tokens. they automatically accept. i now have 147 tokens. i now decide to annex uruguay. since they have 3.4 million people, they have 4 tokens. i spend 40 tokens to annex uruguay and are left with 107 tokens. i decide to annex paraguay. since they have 7 tokens, i spend 70 tokens to annex paraguay and are left with 37 tokens. i save those tokens for next turn.
at the beginning of next turn, i now have 238 tokens (saved + population production = 238)