what is tan,cos,sin,log,sqrt,sqrt3,^2/²,^3/³,°,',",deg,rad,grad,!,+,-,×,÷,/,(,),?,$,#,%,~,<,>,<,>,in.,cm,ft,yd,g,kg,V,eV,MeV,J,c,s,t,b,e,Ve,H,Y,+W,
-W,y,g,p,n,a,uud,ddu,H2,H2O and H2SO4.