$-7\log\left(7-2x\right)=28$
$y''+2y'+10y=0,\:y\left(0\right)=-2\:and\:y'\left(0\right)=0$
$\left(8-7x\right)^2$
$\left(a+\frac{2}{5}\right)\left(a-\frac{2}{5}\right)$
$a+b-c+d,a=2,b=1,c=\frac{1}{4}\:d=\frac{1}{2}$
$8^3\cdot8^0$
$\left(8mn\:+\:4mn\right)^3$
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