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x^2 x^{\msquare} \log_{\msquare} \sqrt{\square} \nthroot[\msquare]{\square} \le \ge \frac{\msquare}{\msquare} \cdot \div x^{\circ} \pi
\left(\square\right)^{'} \frac{d}{dx} \frac{\partial}{\partial x} \int \int_{\msquare}^{\msquare} \lim \sum \infty \theta (f\:\circ\:g) f(x)
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x^2 x^{\msquare} \log_{\msquare} \sqrt{\square} \nthroot[\msquare]{\square} \le \ge \frac{\msquare}{\msquare} \cdot \div x^{\circ} \pi
\left(\square\right)^{'} \frac{d}{dx} \frac{\partial}{\partial x} \int \int_{\msquare}^{\msquare} \lim \sum \infty \theta (f\:\circ\:g) f(x)
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数字行

描述
一步步地解代数, 三角和微积分

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Two\:train\:leave\:towns\:777\:kilometers\:apart\:at\:the\:same\:time\:and\:travel\:toward\:each\:other.\:One\:train\:travels\:11\:kmh\:slower\:than\:the\:other.\:If\:they\:meet\:in\:3\:hours.\:What\:is\:the\:rate\:of\:each\:train?

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