A limit wizard for equivalency of infinitesimal. (%i15) h((sin(x^2)^4*tan(x^5+x^4)^3*sinh(1-(x^2+1)/(x^3+1))^10* log(x^5/(x^5+x^6))*cos(x/(x +x^2)*(%pi/2)))); Evaluation took 00.20 seconds (00.20 elapsed) (%o15) -(%pi*x^38)/2 is this interesting?