getElementById("mathdemo5").innerHTML = "sign(): " + Math.sign(varr);
document.getElementById("mathdemo6").innerHTML = "power(8,2): " + Math.pow(8,
2);

document.getElementById("mathdemo7").innerHTML = "sqrt(81): " + Math.sqrt(81);
document.getElementById("mathdemo8").innerHTML = "abs(): " + Math.abs(varr);
document.getElementById("mathdemo9").innerHTML="min():"+Math.min(0,150,30,20,8,-200);
document.getElementById("mathdemo10").innerHTML = "max(): " + Math.max(0,150,30,20,-8,
-200);
document.getElementById