$4\left(b-4\right)+9$
$\left\{-2+5-\left(3+4\right)-5\right\}$
$x^2-3x-70=0$
$\int4ay^{3\:}dy$
$5\cdot10^7+4\cdot10^6$
$y=10\ln x$
$a^2+2a+4$
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