$\left(3^2+5\right)-\left(\sqrt{16}+3\right)$
$e^{2\ln\left(1+x^2\right)}$
$\int x^2\sin\left(7x\right)dx$
$\int\frac{1}{4x^2-4x+1}dx$
$\frac{0,2+1.1}{0.6}-1$
$\left(-62\right)-\left(-9\right)+\left(-44\right)-\left(-21\right)$
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