What is the derivative of f(x)=(x3+x)2f(x) = (x^3+x)^2f(x)=(x3+x)2?
2(x3+x)(3x2+1)2(x^3+x)(3x^2+1)2(x3+x)(3x2+1)
6x5+8x3+2x6x^5 + 8x^3 + 2x6x5+8x3+2x
Both a and b
None