$\left(8x-5-2y\right)^2$
$70x^2+148x+16$
$\frac{sinx}{cosx}=0$
$\lim\:_{x\to\:1}\left(2^x+x\right)^{\frac{1}{x}}+\lim\:_{x\to\:0}\left(\frac{cos\left(x-1\right)}{x}\right)$
$\left(\frac{2b-2}{2}\right)\:+\frac{2b}{5}=13$
$\frac{-15}{4x}+\frac{-2x-1}{2x}$
$45x^2-25$
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