7⁵ⁿ * 14²ⁿ* 9⁵ⁿ* 2401ⁿ / 21⁽¹⁰ⁿ⁻²⁾*28ⁿ = 7⁵ⁿ * 7²ⁿ * 2²ⁿ *3¹⁰ⁿ * 7⁴ⁿ / 3⁽¹⁰ⁿ⁻²⁾*7⁽¹⁰ⁿ⁻²⁾ *2²ⁿ *7ⁿ= 7¹¹ⁿ * 2²ⁿ * 3¹⁰ⁿ *3² * 7²/ 3¹⁰ⁿ * 7¹⁰ⁿ * 7ⁿ * 2²ⁿ = 3² * 7² = 441
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7⁵ⁿ * 14²ⁿ* 9⁵ⁿ* 2401ⁿ / 21⁽¹⁰ⁿ⁻²⁾*28ⁿ = 7⁵ⁿ * 7²ⁿ * 2²ⁿ *3¹⁰ⁿ * 7⁴ⁿ / 3⁽¹⁰ⁿ⁻²⁾*7⁽¹⁰ⁿ⁻²⁾ *2²ⁿ *7ⁿ= 7¹¹ⁿ * 2²ⁿ * 3¹⁰ⁿ *3² * 7²/ 3¹⁰ⁿ * 7¹⁰ⁿ * 7ⁿ * 2²ⁿ = 3² * 7² = 441