HF RL Explorer

Task 215

Task 215: development task in emrekuruu/math-openenv, an RL environment on the Hugging Face Hub. How many nonzero terms are in the expansion of $$(x+4)(2x^2+3x+9)-3(x^3-2x^2+7x)?$$

The task

How many nonzero terms are in the expansion of $$(x+4)(2x^2+3x+9)-3(x^3-2x^2+7x)?$$