رموز التفاضل والتكامل كعمارة مستقبلية

A 2x2 grid showing four futuristic architectural landmarks shaped after [calculus symbols], set in a utopian solarpunk city. Clean white facade materials, polished glass, and steel structures under a vivid cyan sky. Bright midday sunlight, high exposure, wide-angle architectural photography, Lumion 3D render style, grand sense of scale.