find derivative

Question

y= (3x^5-6x^3)/7secx

Answer 1

Use the quotient rule

dy/dx = [7secx (15x^4 - 18x^2) - (3x^5 - 6x^3)(7secxtanx) ]/(49 sec^2 x)

simplify as needed.

Answer 2

i can not simplify further.