So it's M omega squared R. Okay. So the next step is to basically collect the terms that appear on this term and this term. So, we have M and m, we have our omega squared, and we have the R. So this can be rewritten in the following method. So we have m omega squared r multiplied by one minus v bar multiplied by rho minus FV is equal to zero. So, once again, if we multiply this out, we get back this equation here, and that's why these are essentially equivalent. Now, in the next step, we want to bring this term f multiplied by v to the right side.