$-3x^2+7x+8$
$2\left(x.cos\left(y\right)\right)\left(-x.\:sen\left(y\right)\right)-2\left(x.sen\left(y^2\right)\right)\left(2x.y.cos\left(y^2\right)\right)$
$\frac { \sqrt { 0 } } { 2 }$
$\frac{d}{dx}\sqrt{7+y^2}-x^3\:=\:-4$
$27x+3$
$-x^4+22x^2-121$
$-5-6-17+26+6-52-63+39$
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