function integrali(caso)

syms x;

switch caso
    case 1
        F='sqrt(x+2)';
    case 2
        F='x/(sqrt(2-3*x^2))';
    case 3
        F='x^3/(sqrt(1+x^4))';
    case 4
        F='(log(x))^7/x';
    case 5
        F='(sin(sqrt(x)))/sqrt(x)';
    case 6
        F='1/exp(x)';
    case 7
        F='(sin(x))^3';
    case 8
        F='asin(x)';
    case 9
        F='acos(x)';
    case 10
        F='exp(x)*cos(x)';
    case 11
        F='(x^2) * sin(x)';
    case 12
        F='(sin(x))^2';
    case 13
        F='(log(x))^2';
    case 14
        F='(x^5)*exp(x^2)';
    case 15
        F='(x-1)/(x^2+2)';
            case 16
        F='(3*x-8)/(x^2+5)';
    case 17
        F='(x^3+x)/(x^2+x+1)';
    case 18
        F='sqrt(5+x^2)'
    case 19
        F='sqrt(x^2-8)'
    case 20
        F='exp(x)/(exp(2*x)+2*exp(x)+5)'
end
   
iF=int(sym(F));

iF=simplify(iF)

FF=simplify(diff(iF));

simplify(FF-F)

fprintf('\n \n')



