$y'=4y^2-1$
$235\cdot1\cdot58$
$\frac{dx}{dt}+\frac{2}{200+t}x=3$
$\lim_{x\to0}\left(\frac{\left(1\left(x+h\right)-\left(x+h\right)-\left(x^2-x\right)\right)}{h}\right)$
$23x=1794$
$8y+\left(-4x\right)$
$2a-\left\{7a-\left(3a-7b\right)+\left(10a-9b\right)\right\}$
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