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1. 4t⁷/2t
2. 28r⁷+8r⁵/4r²
3. -3d⁸f⁶ + 27d⁵f⁸ - 15d⁵f⁶/ -3d⁵f⁶
4. 2x² + x-28/ x+4
5. 4y² - 4y + 1/2y-1​