double math_iPow(double base, int exp)
{
	double ans = 1;
	short isNeg = 0;
	if(exp < 0) {
		isNeg = 1;
		exp *= -1;
	}
	while(exp > 0) {
		if(exp%2) {
			exp -= 1;
			ans *= base;
		} else {
			exp /= 2;
			base *= base;
		}
	}
	return isNeg ? 1/ans : ans;
}

double math_exp(double exp)
{
	unsigned int i; //a counter for the loop
	double ans = 1;
	double prev = -1;
	double term = 1;
	short isNeg = 0;
	if(exp < 0) {
		isNeg = 1;
		exp *= -1;
	}
	for(i = 1; ans - prev; i++) {
		prev = ans;
		term *= exp/i;
		ans += term;
	}
	return isNeg ? 1/ans : ans;
}

double math_log(double num)
{
	unsigned int denom = 1;
	double euler = 2.71828182845904;
	double ans = 0;
	double prev = -1;
	double term = -1;
	while(num <= -1 || num >= 1) {
		num /= euler;
		ans += 1;
	}
	for(; ans - prev; denom++) {
		prev = ans;
		term *= (-1*(num - 1));
		ans += term/denom;
	}
	return ans;
}

double math_pow(double base, double exp)
{
	if(exp == (int) exp)
		return math_iPow(base, (int) exp);
	return math_exp(exp*math_log(base));
}

double math_abs(double num)
{
	if(num < 0) return num*-1;
	return num;
}