$dx=t\left(1+t^2\right)sec^2xdt$
$3e+5e+e$
$11\left(1\right)$
$f\left(x\right)=\sqrt{x-2\left(x+5\right)}$
$113.9\cdot29.45$
$\frac{d^4}{dx^4}\left(x^4-4x^2\right)$
$5k-2=-77$
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