$2-4u+8u$
$\sqrt{2+\sqrt{v}}=\sqrt{2v-4}$
$\int\frac{5}{\left(7+5x\right)^2}dx$
$36x^2+120x+160$
$\left(3.4^{17}\right)^4$
$m^2+3m+12=0$
$8^3\cdot8^0$
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