$25a^2-30ab+9b^2$
$\left(\left(1+b\right)b\right)\left(b^2\left(1+b\right)^2\right)\left(b^4\left(1+b\right)^4\right)$
$y=\left(4x^2+9\right)\left(2x-5+\frac{7}{x}\right)$
$\int\sqrt{e^{2y}-1}dx$
$\left(\frac{sin\left(x\right)}{1-cos\left(x\right)}\right)+\left(\left(1-cos\left(x\right)\right)\right)$
$15-\left[2-\left[9+\left(5-1\right)-\left(2+8-9\right)+6\right]-7\right]+8$
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