Accents 强调
$$exp_a b = a^b, exp b = e^b, 10^m$$
$$\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$$
哈哈哈 $a^2$
$$a^2$$
$$\sum_{i=0}^N\int_{a}^{b}g(t,i)\text{d}t$$
$$\sum_{i=0}^N\int_{a}^{b}g(t,i)\text{d}t$$
哈哈哈$$\Gamma$$哦哦
$$\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$$
$$f(x) = a - b \tag{1.1}$$
$$f(x) = a+b$$
$$0 \neq 1 \quad x \equiv x \quad 1 = 9 \bmod 2$$