$xy'+2x^2y-4x^2=0$
$5.6-3.9$
$9.5-3.15$
$2.7-4.2$
$\sin\left(-\frac{20}{29}+-\frac{7}{25}\right)$
$\frac{\sec\left(x\right)+\tan\left(x\right)}{\cos\left(x\right)}=\frac{1}{1-\sin\left(x\right)}$
$\int\frac{2}{\left(x+1\right)\left(x^2+16\right)}dx$
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