Stuff

document.write(base+"<sup>"+exp+"</sup> = ");

if(exp>=0){

for(i=0;i<exp;i++){

if(exp!=1){
document.write(base);
}

if(i!=exp-1){
document.write(" x ");
}else if(exp!=1){
document.write(" = ");
}

}

}

document.write(power(base,exp));