van-facebook.com/LearningCalculus$

f(x,n):=sin(x)^n/cos(x)^(n+2);

F(x,n):=''(trigsimp(integrate(f(x,n),x)))+C$

'(integrate(f(x,n),x))=F(x,n);

subst(floor(n),n,%);

subst(e,%e,%);

F(10,1)-F(1,1);

float(%);