Maths

What is the answer for these questions:-

1) Indefinite Integrals gcx) = (8 + 39x ^ 3) / x

2) Indefinite Integrals hcu) = sin ^2 (1/8 u)

3) Evaluate x ( 8 - 5 x ^2) dx

Thank you

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  1. 1) What does the gcx mean?
    Treat the integrand as 8/x + 39 x^2
    The indefinite integral of that is
    8 lnx +13 x^3

    2) What does the hcu mean?
    3) What are the upper and lower limits of x?

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