$cos\:x\:=\:-\frac{3}{4}$
$196x^4y^5+252x^4y^7+81x^4y^8$
$24r+32+12w-3r+14w$
$2\cos^2x-3$
$1+\sqrt[3]{x^2}$
$36\cdot i^2$
$2x^3+-3x^3$
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