∫cosh^2(x) dx=∫(exp(2x)+2+exp(-2x))/4 dx
=(1/8)exp(2x)+(1/2)x-(1/8)exp(-2x)

∫arcsin(x) dx =∫(x)'arcsin(x) dx =(x)arcsin(x)-∫x/√(1-x^2) dx
=(x)arcsin(x)+√(1-x^2)

∫arccosh(x) dx=∫(x)' log(x+√(x^2-1)) dx
=(x)log(x+√(x^2-1) -∫x/√(x^2-1)dx
=(x)log(x+√(x^2-1) -√(x^2-1)