An overhead view captures a dark-colored tablet, likely an iPad, displaying a digital notebook application. The tablet is partially enclosed in a dark protective case. The screen shows two active tabs labeled "Física" (Physics) and "Mate" (Math). Digital handwriting on a simulated ruled paper background presents mathematical and physics calculations. Problem number "6." is visible, followed by the equation `d(t) = 3t^2`. Subsequent lines detail calculations for specific values and a derivative, including `a) = 3(3)^2 = 27`, `b) = 3(3 + Δt)^2 = 3(9 + 6Δt + Δt^2) = 27 + 18Δt + 3Δt^2`, and `c) ' 3t^2 -> 6t = 6(3) = 18 m/s`. The expression `lim Δt->0 Δx/Δt` is also handwritten near the bottom of the visible content. The battery indicator in the upper right of the screen shows 37% charge. The tablet rests on a blurry, light brown or tan surface, consistent with a wooden desk or table. No individuals are present in the image. The specific location within the city of San Andrés Cholula, Mexico, cannot be determined from the visual information provided. in San Andrés Cholula, Mexico

Jan 27, 2026, 1:55 PM

San Andrés Cholula, Mexico

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An overhead view captures a dark-colored tablet, likely an iPad, displaying a digital notebook application. The tablet is partially enclosed in a dark protective case. The screen shows two active tabs labeled "Física" (Physics) and "Mate" (Math). Digital handwriting on a simulated ruled paper background presents mathematical and physics calculations. Problem number "6." is visible, followed by the equation `d(t) = 3t^2`. Subsequent lines detail calculations for specific values and a derivative, including `a) = 3(3)^2 = 27`, `b) = 3(3 + Δt)^2 = 3(9 + 6Δt + Δt^2) = 27 + 18Δt + 3Δt^2`, and `c) ' 3t^2 -> 6t = 6(3) = 18 m/s`. The expression `lim Δt->0 Δx/Δt` is also handwritten near the bottom of the visible content. The battery indicator in the upper right of the screen shows 37% charge. The tablet rests on a blurry, light brown or tan surface, consistent with a wooden desk or table. No individuals are present in the image. The specific location within the city of San Andrés Cholula, Mexico, cannot be determined from the visual information provided.

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