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(-3.2^3*0.0016+(1-3.2)^3 * 0.0256+(2-3.2)^3*0.1536+(3-3.2)^3*0.4096+(4-3.2)^3*0.4096)/(0.8^3)
(-3.2^3*0.0016+(1-3.2)^3 * 0.0256+(2-3.2)^3*0.1536+(3-3.2)^3*0.4096+(4-3.2)^3*0.4096)/(0.8^3)
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