Question: A list of function can not be further evaluate

Laguerre
charc := -(-1/(-1+I*X))^alpha/(-1+I*X);
Density := int(-exp(-I*X*u)*(-1/(-1+I*X))^alpha/(-1+I*X), X = -infinity .. infinity);
can not evaluate

Meixner
charc := (1+mean/(-1+exp(I*X)*mean)-mean*exp(I*X)/(-1+exp(I*X)*mean))^gamma;
Density := int(exp(-I*X*u)*(1+mean/(-1+exp(I*X)*mean)-mean*exp(I*X)/(-1+exp(I*X)*mean))^gamma, X = -infinity .. infinity);

Bernoulli
charc := 1/(I*X/(-1+exp(I*X)))^n;
Density := int(exp(-I*X*u)/(I*X/(-1+exp(I*X)))^n, X = -infinity .. infinity);
can not evaluate

Krawtchouk
charc := 1/(((-1+exp(I*X)+p)/(p*exp(I*X)))^y*(1/exp(I*X))^n);
Density := int(exp(-I*X*u)/(((-1+exp(I*X)+p)/(p*exp(I*X)))^y*(1/exp(I*X))^n), X = -infinity .. infinity);
can not evaluate

Euler
charc := (1/2)*(1+exp(I*X))^n;
Density := int((1/2)*exp(-I*X*u)*(1+exp(I*X))^n, X = -infinity .. infinity);
can not evaluate

Narumi
charc := 1/(ln(exp(I*X))/(exp(I*X)-1))^n;
Density := int(exp(-I*X*u)/(ln(exp(I*X))/(exp(I*X)-1))^n, X = -infinity .. infinity);
can not evaluate

Charlier
charc := exp(t*exp(I*X))/exp(t);
Density := int(exp(-I*X*u)*exp(t*exp(I*X))/exp(t), X = -infinity .. infinity);
can not evaluate

Laguerre
charc := (1-I*X/(-1+I*X))^t;
Density := int(exp(-I*X*u)*(1-I*X/(-1+I*X))^t, X = -infinity .. infinity);
can not evaluate

Mexiner
charc := (1-q^2*exp(I*X)/((exp(I*X)*c-1)*(q-1))+q*exp(I*X)/((exp(I*X)*c-1)*(q-1))+q^2/((exp(I*X)*c-1)*(q-1))-q/((exp(I*X)*c-1)*(q-1)))^t;
Density := int(exp(-I*X*u)*(1-q^2*exp(I*X)/((exp(I*X)*c-1)*(q-1))+q*exp(I*X)/((exp(I*X)*c-1)*(q-1))+q^2/((exp(I*X)*c-1)*(q-1))-q/((exp(I*X)*c-1)*(q-1)))^t, X = -infinity .. infinity);

Angelescu
charc := 1/A;
Density := int(exp(-I*X*u)*charc, X = -infinity .. infinity);
undefined