tuǒyuánjīfēn
ㄊㄨㄛˇ ㄩㄢˊ ㄐㄧ ㄈㄣ
Simplified 椭圆积分
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 橢圓積分 and it comes back until you know it.