please solve all 4 questions :) to be given the brainliest

Answer:
q1 3 x ^2 − 5 x + 10
q2 1 − y^ 4
q3 exact form: x = − 5 /6
decimal form : 0.83r
q4 1 /2 z^ 2 + 1
Step-by-step explanation:
hope it correct please mark as brainliest if correct
thank you