$15-32.2\left(1.908\right)$
$\frac{2a^3+3a^3-a^2+5a-2}{a-2}$
$\lim_{x\to0}\left(\frac{5sin\left(x\right)+sin\left(4x\right)}{1-cos\left(2x\right)}\right)$
$4x^7y^4dx+2x^8y^3dy=0$
$160-16t^2$
$\int\:\:\:t\sqrt{t^2+2}dt$
$2\sin^{2}x-7\cos^{2}x+4$
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