$\int\frac{1}{\left(x+7\right)^2}dx$
$-4\left(5+-7x\right)+-9\left(-2x+-1\right)$
$cos2x+3cosx+2=0$
$\frac{35x^{4}}{7x^{3}}$
$\int\left(cos\left(3x+4\right)\right)dx$
$-56.2\left(9.8\right)$
$\left(0\right)^2+1$
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