А по русски умеешь писать
пожалуйста напиши по русски
1) 6 - 2 3/8 = 5 8/8 - 2 3/8 = 3 5/8
2) 4 5/9 + 3 8/9 = 7 13/9 = 8 4/9
3) 5 6/13 - 1 11/13 = 4 19/13 - 1 11/13 = 3 8/13
[1;3] ∫ x^3 dx = x^4/4 [1;3] = 1/4 * ( 3^4 -1^4 )= 1/4 (81 -1) = 20
[1;2] ∫ (x^5 -3x^4 +x^3 -1) dx = (x^6/6 -3*x^5/5 + x^4/4 - x) [1;2] =
= 1/6 (2^6 -1^6) -3/5 (2^5 -1^5) +1/4 (2^4 -1^4) - (2-1) =
= 1/6 (2^6 -1^6) -3/5 (2^5 -1^5) +1/4 (2^4 -1^4) - (2-1) =
= 21/2 - 93/5 + 15/4 -1 = -107/20 = -5,35