Riot can we have the equations for the healing for akali's passive

I know the damage is 14+level*3 +.4AP based on my calculations or something close to that But the healing seems to scale with level 7 and higher then levels 2 through 6 I know it is a .7 bonus AD scaling. Also I like being able to use shroud over walls. It feels like something a ninja would do. Please keep this even it it was not intended.
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