$2x^4-6x^3+3x^2-4x-2\:entre\:x^2+x-3$
$\left(9.8-7.99\right)\cdot\left(3.2+0.52\right)\cdot1.6$
$4x^2-32x+60$
$\int\frac{\cos3x}{\sqrt{1-2\sin3x}}dx$
$\frac{dp}{dt}=3p$
$\sin a\:\sin a\:=tg\:a$
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