Integral Calculus | Indefinite Integrals

Find the value of ∫ cosec x (cot x - cosec x) dx
Find Y(x) if d2y/dx2 = x2 + sin 20 when x = 10 and y = 2.
Which of the following not the integration of c(x) = 20x3− 30x2 + 100x + 10009?
What is the value of ∫ ex(sin x - cos x) dx?
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