The way of writing simple formulas can be divided into: dot?, side dot, vertical dot, skimming dot, pick dot and long dot. (Side point writing method): Start the pen and bend it gently, then return it to the middle of the pen. ?
(vertical point writing method): Just like the side point writing method, the direction of the writing should be opposite. ?
(Point writing method): Start the pen and bend it heavily, then gently lift the pen and retract the tip. Its weight change is opposite to that of the vertical point.
(Point-picking writing method): Start the pen with a heavy right upward tilt, then gently lift and retract the tip. ?