simplify ((2/A)y(t)+y^2(t))*d^2y(t)/dt^2=9.81
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Simplify the expression: \(\frac{\left(\frac{2}{A} \cdot y t + {y}^{2} \cdot t\right) \cdot {d}^{2} \cdot y t}{d \cdot {t}^{2}} = 9.81\)
simplify ((2/A)y(t)+y^2(t))*d^2y(t)/dt^2=9.81
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