Scientific calculator with hard case features 272 functions, a two-line display with 12 digits on the upper level and 10 + 2 on the lower level, and Multi-Line Playback to make scientific equations easier for students to solve. Ideal for students studying general math, algebra, geometry, and trigonometry. Advanced Direct Algebraic Logic simplifies entry equations by allowing students to input equations exactly as shown. Calculator features nine independent memories, last answer recall, last-digit correction, continuous calculation, 10 parenthesis levels, log (and inverse), percent, fraction calculation, trigonometry functions, statistics functions including two variable, standard deviation, six regression types and factorials, and computer math, such as logic operators. Calculator runs on battery power and automatically power downs from nonuse.