>>873
被積分関数=4-4x^2+4x^4-4x^6+12681x^8/3164-50x^9/791-1595x^10/452-276x^11/113+5109x^12/452-1406x^13/113+3151x^14/452-1632x^15/791+204x^16/791-4/(1+x^2)
不定積分=4x-4x^3/3+4x^5/5-4x^7/7+1409x^9/3164-5x^10/791-145x^11/452-23x^12/113+393x^13/452-703x^14/791+3151x^15/6780-102x^16/791+12x^17/791-4Arctan(x)