$27\cdot20$
$\frac{\left(2+tan^2x\right)}{sec^2x}-1$
$\int x\left(8sin\left(8x\right)\right)dx$
$\log_{10}\left(x-3\right)=2$
$f\left(x\right)=\left(x+1\right)^2.\left(x+4\right)$
$\sqrt{\frac{3x+2}{x-6}}$
$\left(x+6\right)^2+\left(4x-2\right)^2=\left(5x\right)^2$
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