$\ln\left(15x^2+3\right)$
$\int x^2c^{-3x}dx$
$\frac{\left(2+tan^2x\right)}{sec^2x}-1$
$\int\frac{7}{\left(x+1\right)^3}dx$
$27n\:-\:9t$
$\cos2x+\sqrt{2}\sin x=1$
$e0$
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