$\left(t^2+1\right)\frac{dw}{dt}+tw=t$
$=2x^2-4x+6x^4$
$8+9b-4-7b$
$\left(k-3\right)\left(-4k-7\right)$
$\left(\frac{\sin\left(x\right)}{\cos\left(x\right)\cdot\sin\left(x\right)}\right)^2=\sec^2\left(x\right)$
$\int\frac{1}{\sqrt{x^2-0.01}}dx$
$6^{2\cdot3}$
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