cos(x)=1-x^2/2!+x^4/4!-...+(-1)^n*x^2n/(2n)!+...,
cos(t^2)=1-t^4/2!+x^8/4!-...+(-1)^n*t^(4n)/(2n)!+...
∫cos(t^2)dt=t-t^5/(5*2!)+t^9/(9*4!)-...+(-1)^n*t^(4n+1)/((4n+1)*(2n)!)...
∫(0,x) cos(t^2)dt=x-x^5/(5*2!)+x^9/(9*4!)-...+(-1)^n*x^(4n+1)/((4n+1)*(2n)!)...