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Question		Answer
∫xdx start learning		x + c
∫1/xdx start learning		ln\|x\| + C
∫a^xdx start learning		a^x/lna +C
∫sinxdx start learning		-cosx + C
∫cosxdx start learning		sinx + C
∫tgxdx start learning		-ln\|cosx\| + C
∫ctgxdx start learning		ln\|sinx\| + C
∫1/cos^2xdx start learning		tgx + C
∫1/sin^2xdx start learning		-ctgx + C
∫1/x^2 + a^2dx start learning		1/a arctgx/a + C
∫1/x^2 - a^2dx start learning		1/2a ln\|(x-a)/(x+a)\| + C
∫1/sqrt(a^2 - x^2) dx start learning		arcsinx/a + C
∫1/sqrt(x^2 + a) dx start learning		ln\|x+sqrt(x^2 + a)\| + C

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