$9\tan^2\left(x\right)+16$
$\int\sqrt{121+169x^2}dx$
$3a,6ab^2,12b^2$
$\int x\left(\sqrt{x}+70\sin x\right)dx$
$4x\left(2+3x\right)-4+3x$
$3q\sqrt{a}-2q\sqrt{b}+5q\sqrt{b}-q\sqrt{a}$
$\left(5ax+3by\right)^2$
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