1) ... = 21х^2
2) ...= 40x^7+15x^4+30x^2+2
3) ...= 7x&10-35x^6+9x^15+81x^8
4) ...= 4cosx-4xsinx
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1) ... = 21х^2
2) ...= 40x^7+15x^4+30x^2+2
3) ...= 7x&10-35x^6+9x^15+81x^8
4) ...= 4cosx-4xsinx