Which series represents sin(x2)\sin(x^2)sin(x2)?
∑n=0∞(−1)nx2n(2n+1)!\sum_{n=0}^{\infty} \frac{(-1)^n x^{2n}}{(2n+1)!}∑n=0∞(2n+1)!(−1)nx2n
∑n=0∞(−1)nx4n+2(2n+1)!\sum_{n=0}^{\infty} \frac{(-1)^n x^{4n+2}}{(2n+1)!}∑n=0∞(2n+1)!(−1)nx4n+2
∑n=0∞(−1)nx2n+2(2n+1)!\sum_{n=0}^{\infty} \frac{(-1)^n x^{2n+2}}{(2n+1)!}∑n=0∞(2n+1)!(−1)nx2n+2
∑n=0∞(−1)nx4n(2n)!\sum_{n=0}^{\infty} \frac{(-1)^n x^{4n}}{(2n)!}∑n=0∞(2n)!(−1)nx4n