David_Scherfgen ( 1323 Award_star_gold_3 )

Member Since Jan 15, 2013
By David_Scherfgen ( 1323 Award_star_gold_3 )
610 Donations
3.562,58 € Raised
89.06% Funded
   Please Donate! / Bitte spenden! / ¡Dona por favor!The Derivative Calculator / Ableitungsrechner / Calculadora de Derivadas and the Integral Calculator / Integralrechner / Calculadora de Integrales are offered to you absolutely for free. I have spent...
Categories Education, Science and Technology
By David_Scherfgen ( 1323 Award_star_gold_3 )
10 Donations
$74.00 Raised
8.22% Funded
   Please Donate! / Bitte spenden!Keeping the Derivative Calculator / Ableitungsrechner, the Integral Calculator / Integralrechner and other websites running costs me about $900 per year for server rental and domain prolongation. Of course, this does n...
Categories Education and Science