$-8:-1$
$\frac{6}{15}x^2\left(5x^3\right)$
$9x^2+48xu+64u^2$
$x+8\cdot x+5$
$4sinx+3=5$
$\left(1+\tg^{2}\alpha\right)\cdot\frac{1}{\sec^{2}\alpha}=1-\frac{2}{\cos ec^{2}\alpha}$
$\sqrt{x-3}-\sqrt{2x+2};\:x=7$
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