How-To Bright Blue Contrasting Vibrant Green Tension Beautiful Serene Playfulness Book Cover Ideas with Sky Trees Mountains Bridge Police Officer Natural Landscape Radical Symbol Number 2 Number 4 Number 16 Number 25 Number 36 Number 5 Hand-Up Gesture

A picturesque, lush natural landscape features prominently, with rolling green hills in the foreground and majestic mountains in the distance under a bright blue sky. At the center, a bridge designed in the shape of a radical symbol (√) spans the tranquil scene. Numbers 4, 16, 25, and 36 are depicted confidently walking across the bridge, while the number 2 stands sternly atop the radical symbol, exuding authority as the "police officer." Meanwhile, the number 5, positioned at the bridge's entrance, appears frustrated and caught in a dynamic "hand-up" gesture, seemingly stopped from proceeding. Trees and small details such as flowers enhance the playfulness and beauty.

A bold, modern sans-serif font is used for the book title “ریاضی نهم,” positioned in the upper center of the cover, in vibrant white for clear readability. The author’s name, محمدپارسا زرآبی, is placed in a smaller but similar font style at the bottom right corner in an earthy brown or sandy color to complement the natural tones.

The landscape dominates the entire background, with the bridge spanning from left to right in the middle of the cover. The numbers are staged within the scene for clarity. The book title sits in the upper part of the cover, without overshadowing the main illustration. The author’s name balances the design by occupying space subtly on the lower right corner.