  Advanced D.A.L. Series Scientific Calculator. Ideal for High School Students, College Students and Professionals.
Features:
- Direct Algebraic Logic allows students to enter the elements of an expression in the exact order they appear in the textbook.
- Extra Large Display: 12 digit, 2 line display - 1 line equation and 1 line numeric.
- Multi-Line "Playback" after getting an answer the user may then "playback" the expressions and substitute new numeric values.
- Additional Features: differential and integral calculus functions, 419 functions, and hard case.
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