$\left(3\sqrt{a}-\left(4x^2\right)\right)\left(4x^2+3\sqrt{a}\right)$
$\sec^2\left(x\right)\sin^4\left(x\right)$
$9+a^2=4a^2$
$4.58+4.83$
$\frac{8}{x}>3$
$\int\frac{4-x}{x^2+4x+3}dx$
$\int_2^0\sqrt{1+\left(x\right)^2}dx$
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