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syms x x1 alpha u t;
int(1/(1+x^2)) %è¿è¡ç»æ atan(x)
int(sin(alpha*u),alpha) %è¿è¡ç»æ -cos(alpha*u)/u
int(besselj(1,x),x) %è¿è¡ç»æ -besselj(0,x)
int(x1*log(1+x1),0,1) %è¿è¡ç»æ 1/4
int(4*x*t,x,2,sin(t)) %è¿è¡ç»æ -2*t*cos(t)^2 - 6*t
int([exp(t),exp(alpha*t)]) %è¿è¡ç»æ [ exp(t), exp(alpha*t)/alpha]
A = [cos(x*t),sin(x*t);-sin(x*t),cos(x*t)];
int(A,t) %è¿è¡ç»æ [sin(t*x)/x, -cos(t*x)/x]
[cos(t*x)/x, sin(t*x)/x]
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