Основы теоретической физики/test

$\left|\stackrel{‾}{\underset{\_}{\cancel{\underset{a}{\overset{b}{\int }}{|}_{t_1}^{t_2}=\bcancel{0}}}}\right|$
${\frac{1+\frac{1}{\frac{1}{y}-x}}{1+\frac{1}{y}}+\frac{1+\frac{1}{x}}{1+\frac{1}{y}}+\frac{x}{y}|}_a^b$

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$x(t)=a\cos (\omega t+\alpha )+\frac{f}{m({\omega }^2-{\gamma }^2)}(\cos (\gamma t+\beta )-\cos (\omega t+\beta ))$