Include Calculator in all practice problems beyond a certain point ie Calculus
I cannot tell you how many times I've had something in practice problems come back wrong because I'm trying to find something like ( (16^3 / -3) + (16^2) - 20(16) ) - ( (-4^3 / -3) + (-4^2) - 20(-4) ) and it turns out I missed a minus sign on my scratch paper. I'm old. Please help my aging brain manage some of the complexities, so I can focus on the concept.
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