Tenses and moods are OK.
A few problems with other aspects:
Te ayudaré si tu le dices que me deje en paz.
Si el ADN de todos los matones fuera analizado al nacer ....
she will make trouble = le pondrá obstáculos / tendrá objecciones / le hará un escándalo (choose according to context, but "le hará problemas" is not a common Spanish collocation and other options have different meaning)
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