$-\left(2y+1\right)$
$y ^ { 2 } = - 7 c z - 3$
$6x^2-x-1122$
$\frac{d^2}{dx^2}\left(\frac{1}{1+senx}\right)$
$\frac{dy}{dt}+4y=2$
$\frac{5}{sin\left(93-x\right)}=\frac{3}{sin\left(x\right)}$
$0,05\:+0,005$
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