$\int\frac{x^2+x}{\left(x^2+4\right)\left(x+2\right)}dx$
$\int9x^3\ln\left(x\right)dx$
$tangente$
$-26-n=-4$
$-6x+7\le2+13x$
$h^2-30h+225$
$-4x+3y-z=16$
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