transformers gguf moe frankenmoe merge mergekit lazymergekit mistralai/Mistral-7B-Instruct-v0.2 meta-math/MetaMath-Mistral-7B en base_model:AmeerH/Mistral-Math-2x7b-mix base_model:quantized:AmeerH/Mistral-Math-2x7b-mix license:apache-2.0 endpoints_compatible region:us conversational