input a function, equation, or other things such as the defintion of your functions or variables. Then press "enter" to draw what your want.
marching squares&线性插值 supported functions: sin,cos,tan,sinh,cosh,tanh,csc,sec,cot,csch,sech,coth asin,acos,atan,asinh,acosh,atanh,acsc,asec,acot,acsch,asech,acoth; erf,erfc,floor,ceil,abs,round;sqrt,cbrt,logb,log,ln
