Desert Ruins of Pure Math Grid

Desert Ruins of Pure Math (Cairo-style monumental stone)
A 2x2 grid of 4 monumental mathematical symbols built as ancient desert ruins in sandstone
[Top Left: The Integral (∫) as a collapsed arch-aqueduct, wind-eroded blocks, carved microtext equations, tiny caravans for scale]
[Top Right: The Sigma (Σ) as a stepped fortress-ziggurat with sharp terraces, long shadows, sand drifts collecting in corners]
[Bottom Left: The Pi (π) as two colossal pylons and a lintel bridge over a narrow oasis canal, chipped stone, scattered rubble geometry]
[Bottom Right: A Penrose Triangle as impossible ruins half-buried in dunes, optical illusion architecture, Escher perspective, sunlight slicing across paradox edges]
Aerial oblique view, golden desert haze, crisp hard sunlight, dramatic shadows, photoreal ruins texture, subtle river ribbon, swiss 2x2 grid layout.