# 
restart;
series(exp(x),x=a);
series(ln(x),x=1);
series(ln(1+y),y=0);
S1:=series(sin(x),x=0,8);
S2:=series(cos(x),x=0,8);
S1+S2;
series(S1+S2,x,8);
series(S1*S2,x,8);

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