$\int4x^3\left(x^4+4\right)^3dx$
$\frac{\senx-\cos x}{\tgx-1}$
$\int\left(\frac{\left(9\sqrt{x^2-16}\right)}{x^4}\right)dx$
$\left(-4x+24\right)^2$
$\left(6-2x^2\right)^3$
$x^2+14x+5=0$
$7-\left(5-8\right)-\left(4-12+6-11\right)$
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