Respuesta:
1=5x+15
2=2x-3/x-3
3= -2x+21/x³+3x²-4x-12
4=8r+20/r+2
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Respuesta:
1=5x+15
2=2x-3/x-3
3= -2x+21/x³+3x²-4x-12
4=8r+20/r+2