704 of 1,000 players

Curve Sprint is unlocked. 296 more to head-to-head Battles.

space618

[7]Natural🇦🇹

1,289 / 4,000 XP into level 7. Playing since September 2026.

Levels: #9
Sprint: #19
Curve Sprint: unranked
Diverge: #23

League

Secant

2 promotions · 3 weeks played

space618 Squiggles

360

Area Under the Curve · 17/36 collected

Integral Eel

Natural Log Owl

Cosine Kitten

Parabola Pup

24day streak, best of 24.

Badges

12 of 58

✎∿≡△Σ⌛↑≫▲∅∆✹

Stats

Problems solved: 610
Time played: 11h 29m

The rest is kept private.

A picture, ready for a story or a post. No link needed.

think you can beat space618?

Today's problem

\frac{d}{d x} [- 4 x - \frac{5}{x ^{2}}]

The hard one · double XP

For f (x, y) = 4 x^{2} + 2 x y^{2} - 11 y^{2}, find f_{xx} f_{y y} - (f_{x y})^{2} at (0, 2)