$3ln7x$
$-\sec\left(x\right)+\frac{1+\tan\left(x\right)}{\sin\left(x\right)}$
$99^2-1$
$f\left(x\right)=\sqrt[3]{\left(5-7x\right)^2}$
$\frac{x+2}{2}=\frac{x+3}{3}$
$tanx\left(1+sinx\right)$
$\int7x^{-3}dx$
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