$\int t\cdot e^{3t}\:dt$
$\sec\left(x\right)\cdot\sin\left(x\right)\cdot\cot\tan\left(x\right)=1$
$6^2+12\cdot5+5^2$
$\log\left(x\right)+\log\left(x+3\right)=1+\log\left(4\right)$
$x\left(y+1\right)dx+y\left(x+1\right)dy=0$
$2x^2-2x-40$
$\frac{x^2+3x+4}{x+2}$
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