$10x^7-5x^515x^3$
$-1030-1600$
$\cos^2x+3\sin^2x-3$
$x=3y$
$\sqrt[3]{8x^2}$
$-10.\left(-4-6\right)+9$
$12+\left(7-11\right)+8-\left(6-7\right)-7+12$
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