EL-W535TGBBL model is perfect for students studying general math and science, pre-algebra, algebra, geometry, trigonometry, statistics, biology, and chemistry. This calculator performs 422 advanced scientific, math, and statistics functions. The EL-W535TGBBL utilizes a 4-line display featuring an exponent symbol and WriteView, which makes scientific equations easier for students to solve because calculations can be entered and viewed exactly as they would be written. The home key allows users to start fresh from any screen. This calculator has eight temporary memories, four definable memories, one independent memory, and one last answer memory. This calculator also allows equation editing & playback, 1 & 2 variable statistics, normal, stat, and drill modes, seven regression types, and N-BASE calculations: HEX, BIN, DEC, OCT, PEN. Other functions include: logarithms, reciprocals, powers, roots, factorials, trigs, and hyperbolic trigs. Includes a protective hard case and operates on battery power.