A close-up photo of a green chalkboard. The correct derivation steps of the quadratic formula are written in white chalk. First line: ax^2 + bx + c = 0. Second line: x^2 + (b/a)x = -c/a. Third line: completing the square. Final line: x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}. The handwriting is neat and clear. No garbled symbols.
An ultra-realistic photo of a Penrose triangle made of polished gold, placed on a marble table. This object forms a continuous, impossible triangular optical illusion. The geometric structure has no breaks. Studio lighting.
A flat graphic design of an ambigram. Viewed normally, the word reads 'LIFE'; when rotated 180 degrees upside down, it reads 'DEATH'. Black ink on white paper, Gothic calligraphy style.
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