Hi, how do you find the first and second derivatives of the function. y=(x^2-7/63x) (x^4+1/x^3) i think for the first derivative dy/dx it's 2/63x-3/63x^-3+4/9x^-5 but i'm not sure, and i have no clue for the second derivative d^2y/dx^2.

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each,and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent.how much did jame pay at the end?