$\left(2t-t+2\right)\left(t-2\right)$
$2y^2-50$
$\left(18\right)\:\left(-35\right)$
$-40\:restar\:-90$
$\frac{dy}{dx}=e^{x^3}+3x^2y$
$\left(5x^4-3x+8x^2\right)-\left(8x^4-7x^2\right)$
$2\cdot\cos^2\left(x\right)-\sin^2\left(x\right)=0$
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