$-5+-4+-1+8+-2+7$
$25x^2^2$
$49x^4+42x^2y^2+9y^4$
$\sin^3\left(z\right)\cos^2\left(z\right)=\sin^3\left(z\right)-\sin^5\left(z\right)$
$6-10\left(4-v\right)$
$-6y+8\left(y-5\right)=-28$
$\left(2x-y\right).\left(4x^2-2xy-y^2\right)$
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