How much return should I expect in long term?

I'm currently having a portfolio of 5 mutual funds 1. PPFC- 25% 2. HDFC Mid- 25% 3. Motilal Mid- 25% 4. Quant Small- 16.66% 5. MO micro cap- 8.33% How much Return can I expect from this portfolio in long term? Investment horizon - 15+ years Risk appetite - High Any suggestions and advises will be appreciated.