"If you spend much time solving equations you eventually get a knack for it. Not saying that calculators not worth it (never used one), I just don't think they

"If you spend much time solving equations you eventually get a knack for it. Not saying that calculators not worth it (never used one), I just don't think they are that much useful. Why do you need to carry something with you when you can do calculus and solve linear and quadratic equations in your head?" That's how your argumentation sounds to me.