$\int2\cos\left(7x\right)x^3dx$
$x^2+1=1$
$\frac{dy}{dx}=-y\cdot e^x$
$16x^2-34x-15$
$\frac{5.\left(3^2.10\right)^2}{3^2.60^2}$
$\left(\frac{\sqrt{2}}{2}+\frac{\sqrt{2}}{2}i\right)^2$
$\frac{1}{9}x^2-\frac{2}{3}xy+y^2$
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