интеграл 

dx / (x^1/2 + x^1/3 + 2 * x^1/4)

помогите решить и разобраться а то что то не понял как делать такие примеры

До нового года маша посмотрела 216 серий мультсериала, а после нового года на 74 меньше. Ей не удалось посмотреть 42 серии. сколько серий в мультсериале?

описание географического положения черного моря?

Put the verb in brackets into the Present Indefinite and the Present Perfect. 1 Look! They(stop) 2 I (want) to see you. I (not/see) you for ages! 3 "What (be) your name?" - "My name (be) always Cole." 4 "You (read) this book?" - "Yes" - "What you (think) of it?" 5 I (not/be) to a zoo before. It (be) a nice feeling to go somewhere you never (be) before. 6 "You (know) Nick?" - "Yes" - "How long you (know) him ?" - " I (know) him for 10 years" 7 There (be) a lot of things I (want) to clock for a long time and I (not/do) them. 8 You (realize) we (know) each other for quite a period of time now? And this (be) the first occasion you (ask) me to come with you. 9 "You (know) the girl who just (leave) the shop?" - "Yes , that (be) Bella York" - "She (be) a customer of yours?" - "Not , exactly" . She (be) here several times , but she never (buy) anything. 10 Come in, I (be) awake since sun-up. 11 I (not)see) your pictures for a long time . Can I look round? 12 It'll be good to see him again.How long he (be) away? It (seem) ages. 13 I (know) you nearly all my life , but I never (see) you so excited about anything