1)
What is the meaning of "v'Eleh Tzafanta bi'Lvavecha"?
1.
Rashi: Hidden in Your heart was intent to swallow me, as if You do not remember [Your Chesed to create me and guard me].
2.
Ibn Ezra: Since You did all this Chesed with me, why are my mistakes guarded with You?
3.
Malbim: Even though You knew that I will sin, You hid it in Your heart, and did not decree that I not be created.
2)
What do we learn from "v'Zos Imach"?
1.
Rashi: You did not forget.
2.
Malbim: Surely You knew at the time that I will sin, and even so You acted as if You do not know.


