Transformers solve these using attention (for alignment), MLPs (for arithmetic), and autoregressive generation (for carry propagation). The question is how small the architecture can be while still implementing all three.
緊急避妊薬 “深刻な副作用が？” SNSの根拠ない情報に注意を，详情可参考下载安装汽水音乐
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Путешествия для россиян стали еще дороже из-за конфликта на Ближнем Востоке20:37
UPDATE: Solutions can be read here，详情可参考51吃瓜