$\frac{1}{y}dy=\frac{1}{1+x}dx$
$x^2+24x+143=0$
$12x^2-4+5$
$4x-2.x-3$
$-497\cdot100$
$a:184\:c:513$
$\left(2a-3b+c\right)\left(2a+3b-c\right)$
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