Derivative of g(x) = 3x^2(x^2-(2/x)) I did derivative for each individual thing and got stuck at 6x(2x-2x^-2) so I am unsure what to do or what I did wrong​

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.