$y'=\frac{y^2}{xy^2+xy}$
$y^5-7y^4+12y^3+8y^2=0$
$\left(\frac{6}{7}-3x^3\right)^2$
$\int w^2dw$
$\left(\frac{\sin\left(20\right)\cdot\cos\left(40\right)+\cos\left(20\right)\cdot\sin\left(40\right)}{\cos^2\left(30\right)-\sin^2\left(30\right)}\right)$
$\left(99\cdot101\right)$
$-9+v=-3$
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