Simplify the following algebraic expressions.
1. 3r + 5s - 4r =8s
2. 7m² - 8n + 12n - 15m²
3. -2x²y²z² + 7x²y² - 11y²z² + 25x²y² - 19x²y²z²
4. 3 a/b - 9bc + 13 a/b - 38bc
5. x/4 + x²y/5 - 3x/2 + xy²/5
The / thingy are the fractions cause i cant do the - thingy
1. 3r + 5s - 4r =8s
2. 7m² - 8n + 12n - 15m²
3. -2x²y²z² + 7x²y² - 11y²z² + 25x²y² - 19x²y²z²
4. 3 a/b - 9bc + 13 a/b - 38bc
5. x/4 + x²y/5 - 3x/2 + xy²/5
The / thingy are the fractions cause i cant do the - thingy
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1. -r-3s
2. -8m²+4n
3. -21x²y²z²+32x²y²-11y²z²
4. -47b²c+16a
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b
5. 1/5x²y+1/5xy²+ -5/4x