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HELP

function f(x) {with(Math){ y = pow(x,4)-2*pow(x,3)+7*x-5}; return y }
...
aX = -2; bX = 2; aY = -10; bY = 10
Dx = 1/2; Dy = 1
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xx=[-2,-1,1,2]; yy=[-10,-5,5,10]
Qx=[0.803,-1.656]; Qy=[0,0]
Q1x=[-0.861], Q1y=[f(-0.861)]
Q2x=[0,1]; Q2y=[f(0),f(1)]
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AX=BX=AY=BY=""
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AAX=aX; BBX=bX; AAY=aY; BBY=bY
...