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I find it interesting that so many know how to use all kinds of apps on their cell phones, but so few are able to do simple algebra any more. If you ask around, engineers not included, I think you would find very few people e.g. to be able to find the axis of symmetry of the parabola ## y=x^2+5x+6 ##. It probably isn't something that a musician or a waitress needs to know how to do, but there is a beauty in mathematics that so many these days seem to be missing. The algebra, geometry, trigonometry, and even calculus is something the students would do well to learn, and not let it fall by the wayside.